Step 1: Inspiration for the project
I decided to make a different version of it, without the house. I got the inspiration for the membranous wings and the elder sign from this pattern - although I changed it a bit.
I found this fantastic website to help me choose a font fit for cross stitching. You may also choose another font (you can find plenty of free alphabet patterns on the internet). Remember that upper case-only alphabet don't usually look good when used for a whole sentence.
Originally I was going for a spookier font but I actually like the innocent look on the Madrid font.
Step 2: Tools and materials
You will need 4 colours of embroidery floss, here are the ones I used :
Black : DMC 310
Dark green : DMC 895
Light green : DMC 3346
Red : DMC 817
You will need carbon paper to transfer the elder sign on the fabric. An embroidery hoop and a small screwdriver will be very helpful but you may do it without hoop (if you use a hoop though, you will need a screwdriver). I prefer wooden ones to elastic plastic ones.
You will obviously need scissors and a needle (embroidery needles are usually bigger and less sharp than sewing needles, and their eye is bigger).
You may find all of the above in a fabric shop.
In the end you will need a frame, but you should wait until the cross stitch is finish to take the measures.