Introduction: Monster Mud Reaper

Picture of Monster Mud Reaper

Parts List

2 – 90 degree PVC elbows
3 – 45 degree PVC elbows
1 – 4-Way PVC Cross
2 – 1 1/4 “ --> 1” PVC Adapters
1 – 8ft. 1 ¼” PVC Pipe
1 – 1” PVC Cap
¼” screws
1 – Metal hook with screw end
~ 25ft. of chicken wire
1 – 1 ½” steel flange
1 – 1 ½” x 4” steel pipe
3 – STC-R brackets (home depot) Store SKU # 464163
1 – RTU2 brackets (home depot) Store SKU # 251352
1 – 2’ x 2’ 3/4" MDF Board
Burlap (Wal-Mart)
1 – Gallon of Black Paint (cheapest you can find. Got mine at Wal-Mart)
1 – Rust-o-Leum Stone style spray paint (optional) (Photo)
3 – Foam brushes
1 – Drywall Mixing tool
1 – Gallon of Dry-Lock Masonry Sealer (Link)

Step 1: Building the Base

Picture of Building the Base

Place your 1 ½” Steel flange in the center of the 2’ x 2’ MDF Board. Mark off the locations of the four holes so we can secure the flange to the board.

Step 2: Building the Base - Part 2

Picture of Building the Base - Part 2

Drill the four holes in the board. On the back side use a bit that is the size of your nuts or slightly larger. Drill part-way through the board to allow the nut to sit flush with the bottom of the board so you reaper can stand flat. (I messed up on that first

Step 3: Making the PVC Skeleton

Picture of Making the PVC Skeleton

Affix the flange to the board with bolts and nuts and then thread the 4” steel pipe to the flange.

Take your PVC pipe and cut it to whatever height works for your prop. Remember that the top of the pipe will be at shoulder height. Sand down one end of the pipe with sandpaper or I highly recommend using a dremel. The main goal here is to make the pipe fit snugly into the 4” steel pipe on the base.

Next, stick the 4-way or 3-way PVC cross on the top of your PVC pipe.  Now we need to cut the pipe for the arms/hands. I used this web page to figure out proportionate lengths of shoulders and arms for the overall height of my prop.

                      Zombietronix - Biped Proportion Calculator (Human. Creature. Monster. Other.)

Step 4:

Picture of

Once you got all your pieces cut and put together. Drill some drywall screws through each PVC fitting and pipe to hold them secure so they don’t come apart or twist. On the end of the hand on my prop I attached a PVC cap and screwed in a metal hook. This is where my lantern is going to hang from.

Depending on the position of your reaper you may need to add some supports to support the weight of the burlap when it has the monster mud on it. I used a couple brackets I listed above that I found at home depot and some scraps of wood. The brackets are nice because they are thin enough to bend to the shape you need and can be easily attached using drywall screws.

Also, now would be a good time to run any wiring if you are going to hard wire a lantern or electrical prop. Next, we take the chicken wire and give the prop some shape. Try to wear some thick gloves when doing this because the chicken wire can be sharp. I made a big cylinder for the body and shaped it a bit. Next, I took a small piece and attached it to the top to shape the head. Lastly, I made another smaller piece and draped it over the arm. (The second picture I changed the arm support so it would be hidden under the burlap)

Step 5: Making Monster Mud

Picture of Making Monster Mud

Now for the fun part! To make the monster mud I used a mixture of half a gallon of black latex paint with 5 gallons of drywall mud. I ended up using ¾ of the mixture for this prop. Use a drywall mixing drill bit to mix in the paint. You will thank yourself for spending the 5 bucks to get this tool if you don’t have one already.

Step 6: Burlap

Picture of Burlap

Cut you burlap and test fit them on your prop so you can make sure everything will cover correctly.  Next I took a blade and tattered up all the edges of the fabric to try to give it a worn look.

Step 7: Messy Time!

Picture of Messy Time!

** Before you start this step put some plastic down on the floor as this part is messy :) **

Take each piece and submerge it in the monster mud mixture. Make sure you thoroughly coat each piece. When you pull the pieces out try to squeeze off any extra mud. It also may be a good idea to have a friend help you with this process since the burlap is extremely heavy when coated with monster mud. I made the mistake of doing this by myself. You should have seen me trying to lift these huge pieces weighting a ton onto my 7 foot prop….not pretty…lol

Once you got all your pieces on play around with them until you like the overall flow of the fabric on your prop. You can also slap on some mud and work it onto the fabric if you missed some spots.

Step 8: Waterproofing

Picture of Waterproofing

Let your prop dry for a couple days and it will become significantly lighter when all the water dries out of the mixture.  Spray the inside of prop where you can see the chicken wire with black flat spray paint. I sprayed inside the hood and under the arm. Makes it looks really creepy at night when it’s just a super dark nothingness inside his cowl.

Now we want to water proof our prop so it doesn't turn to mush when its outside in the weather. I used a can of Drylock which is a masonry sealer. It has a grainy texture to it which actually gives it a stone like appearance.

Optional : I bought a can of Rust-o-Leum stone spray paint and sprayed my whole prop to give it and even more stone look.
The next painting step I applied a dark grey wash. Mix some black paint from the same can you used for you monster mud with water. Dilute it with water so you can let it run down your prop. I used some foam brushes to soak up the water then blotted them on and let the wash run down.

Step 9: Finishing Touches

I am going to have my reaper holding a lantern to give it some nice somber lighting. Also I am going to affix some Spanish moss to make it looks like it been sitting in my graveyard for many years.

Advanced Step:

A little while after I built this I wanted to add something different.  Most people had seen the props for a couple years and new it was static so I decided to add a spitter mechanism to the inside to really catch people off guard.  You should have seen the people jumping on Halloween after I would set this off.

I purchased the spitter mechanism from Brent @ DC Props: Link

Like us on FaceBook to see all the rest of our props at Phantom Hollow:



KylieW11 made it! (author)2017-06-07

We tweaked it a bit. We used plaster instead of monster due things being stupidly expensive in Australia. We set up the frame a bit different in a more square design to distribute weight more evenly. Had fun painting him, scared the neighborhood. Can't wait to set him up this Halloween and see what the town thinks.

DeclanM16 made it! (author)2016-10-19

In the process of making the mud stage......haven't mixed anything yet...quick question, is it better to soak the cloth in the mud or paint it on as mentioned on other sites....

Millerkat123 (author)2016-10-18

this was the most awkward project we've ever done! the directions seemed to be only half there we had a horrible time with the "mud". it was never really liquid enough to "wring" out! it was extremely difficult to put on the chicken wire we had to make it up as we went along bc no instructions were given on how to attach. the pvc pipping wasn't strong enough to hold reaper up we had to prop up against the wall with 2x4 until dry now, after all the complaints, it did turn out awesome!! we will be putting out on the porch in the next few days

CynthiaW3 made it! (author)2016-10-12

I made it without the paint. I also used an upside pvc shower drain screwed into the board and a 2 inch pvc pipe instead of the metal flange and steel pipe. It worked out great.

Absinthe-Dragon (author)2014-08-24

The link you included is dead:

Also the main site: does not seem to exist anymore.

Do you know of a different link :)

AlanS143 (author)Absinthe-Dragon2016-09-28 not exactly the same but useful

rfrawley84 made it! (author)2016-09-25

I made mine a little different, I used a flagpole flange and bolted the PVC support to it at the bottom. Added a belt and cover over the face. Cost more then expected but turned out well.

JulieR27 (author)2015-10-06

So, I built this, and mine does not look as nice. First, how did you attach the burlap to the body without it falling off? With the monster mud I had a heck of a time even getting it to stay, to the point where I drilled a screw in, wrapped it around the arm, and hooked it to the screw. That doesn't look to be what you did.Did you use two pieces of burlap for the body, or just one? And how did you keep the chicken wire for the head from collapsing with the weight of the mud? I have another reaper ready to be mudded but I don't want to make a shamble of it again. I love the creature, and I have spent roughly $150-200 on this project (double for two) and I want to have him on my porch soon!

RenoC (author)2015-09-26

Great stuff and duly shared!

Thanks Jamie

thegiftsguy1 (author)2015-09-02

This was just added to our site as a fun DIY project for Halloween. Great job on this.

gonecountry007 made it! (author)2014-10-27

Another great Halloween Idea from Instructables Thanks JIMMYZDC . We put a small light in the lantern.

miscbs made it! (author)2014-06-15

Instead of the steel pipe, I used a PVC fitting that screwed into the flange. Other than that I built it per the instructable. Thanks!

nickolaiisoe (author)2013-04-08

Ur on halloween forum arent u

jimmyzdc (author)nickolaiisoe2013-10-17

yup :)

nickolaiisoe (author)jimmyzdc2013-10-19

cool i like ur mind its pretty awesome ;)

Paesan (author)2013-10-10

How do you get the chicken wire to stay put?

jimmyzdc (author)Paesan2013-10-17

I attached the sections of chicken wire together by just bending single wires from the mesh around a "circle" section on the other piece of the chicken wire. Chicken wire is kind of a pain to work with. If you need more stabilization you could try to pick up some thin wire and maybe drill a hole through the PVC pipes where you want to attach too and thread through and then tie off to the chicken wire.

zinnia11 (author)2013-10-06

how did you attach the supporting pvc to the vertical pvc and the arm?

jimmyzdc (author)zinnia112013-10-17

I'm not sure what you mean by the supporting PVC but the vertical PVC and the arm are connected by a cross tee.

ojflores (author)2013-08-29

would wood work just as good as pvc?

jimmyzdc (author)ojflores2013-10-17

Probably would work fine but the PVC will probably last longer and will be much easier to put to gether since you can just use different tees and connectors.

dylanp1936 (author)2013-07-25

Awesome project! Will this work?

jimmyzdc (author)dylanp19362013-10-17

Yup that works. Just a different color.

poofrabbit (author)2012-11-13

Congratulations on being a finalist in the Halloween contest!!! Can’t wait to see if you win! Good luck!

jimmyzdc (author)2012-10-29

Nope the hood is just a piece of fabric laid over the mesh shape. The fabric isn't attached to the mesh at all. Once the monster mud dries it becomes very rigid. I can actually bear hung it and pick it up to move it around.

I used around 20ft of burlap fabric.

rcroft (author)2012-10-25

Did you do any sewing for the hood or cloak? And how did you attach the whole thing so wind didn't affect it, or it would shift? I know you monster mudded the whole thing, was that enough to keep it all together? And how much fabric did you end up using?

jimmyzdc (author)2012-10-24

I built this a while back so I cant remember the exact cost. I want to saw it was between $100-$125. You may be able to save some money if you have some things around the already. Also you will probably have some material left over to make another small monster mud creation.

lawn_mower_man (author)2012-10-19

WOW! Great Ible, I want to do this hopefuly this year but maybe next. How mush in all did it cost?

edelavegas (author)2012-10-17

Thank you so much for entering this reaper project! I built it last year after having found it on monsterlist. It was for my school's haunted house (budget constraints) so the frame was built instead from scrap lumber. I ended up getting an oversized skull which is tucked deeply in the hood, and I lit him from the interior. He's was a great hit, and has lived in my classroom all year. Again, a million thanks!!!!

jaxonswan (author)2012-10-15

Great project, currently building an eight foot reaper. Roughly about $175 for supplies, not including accessories. Also built a housing inside for a speaker and a fog machine with remote. A breath of fog for anyone who wants to peak under the hood.

applespite (author)2012-10-13

Monster mud! I haven't thought about that in years! It brings me back! Excellent instructable!

DeeRilee (author)2012-10-12


mikeg_373 (author)2012-10-12

Very cool by the way!

mikeg_373 (author)2012-10-12

a couple diodes for eyes would be the easiest and cheapest. Dim, Red.

actimm (author)2012-10-12

Another suggestion is to use furniture nuts. They basically look like threaded sleeves with spikes around the sleeve. It has the advantage of being closer to flush and not being as likely to fall out.

1inspirit (author)2012-10-12


sassycat (author)2012-10-11

This is really neat. I really want to try it.
how much do you think the whole thing cost?

mainah (author)2012-10-11

Put two Christmas tree light sockets in the head and put red or green bulbs for a real creepy eye feature.

jec0435 (author)2012-10-11

ya, a cost estimation would be greatly appreciated! I love this one as well.

deltafour (author)2012-10-11

This is so BADASS!

thebeatonpath (author)2012-10-11

THIS IS INCREDIBLE! I love it! I just may have to create this one.

sarawelder (author)2012-10-11

great result ! I'll certainly save this!

darthsinister (author)2012-10-11

Great, like it. I am thinking of making two, both at 6feet in height, One of your build and another for me, scare the #&($#(&*$ out of people. How much did the build cost you, want/need a rough estimate. Thinking about making for Halloween parade float.

Szajba (author)2012-10-11

Reminds me of Led Zeppelin album cover

Peale (author)2012-10-11

I want to turn this into a costume!

wabijishi (author)2012-10-11

Looks so creepy and real!!!! Thx for sharing!

Ghostsoldier (author)2012-10-11

Thiz is a genuinely scary prop, and I congratulate on this build....I'm going to give it a try!

l8nite (author)2012-10-09

that's awesome !

nicholas1951 (author)2012-10-09

This is a wonderful creation! Deceptively simple in design, but absolutely stunning as a finished product. Thanks for sharing.

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