Architectural Demands

When you play this card, create a 0/4 Wall
Barricade token with "Sacrifice this in
your upkeep"
At the beginning of your turn create X 0/4 wall
barricade tokens with "sacrifice this in your
upkeep the turn after this one" where X is
equal to the number of Barricades on your
battlefield, maximum of 4.
If there are no wall barricade creatures on the battlefield at the beginning of your main phase,
exile this card