Step 1: Start

First you build the walls like a normal house.
Wait what sponge?<br>
yey ive just made it
i tried to make a HUGE under water house in mc fe but didnt have enough blocks to fill it in !
No the water will not rush back in because the door acts as a block
Nope. Doors can hold back water.
but wat happens if u open the door? will the water rush back in?

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