Walking Sand Fortress

Prosperity - you may only cast Walking Sand Fortress if this is a prosperity turn (at the beginning of your upkeep you may chose to give all creatures you control Defender until end of turn, if you do, you get the prosperity ability).
All damage that would be done to you or another creature you control is dealt to Walking Sand Fortress instead.
All damage that would be dealt to Walking Sand Fortress by creatures with deathtouch is prevented.