Crumbling Colossus

Seven power of trample for five colorless mana is a body well ahead of the curve, and the sacrifice clause is exactly what that rate costs: this Golem swings once, then crumbles at end of combat whether the attack connected or not. The design is a single-use battering ram, a creature that exists to convert one combat step into damage and nothing else. Trample is doing real work here, since the whole point is to push seven through a chump blocker rather than waste the swing on a trade. What the constraint quietly opens up is the second life of the card after it attacks: a 7/4 that sacrifices itself is a gift to any deck built on death triggers, reanimation targets, or a graveyard worth filling. It blinks back fresh, it feeds a sacrifice engine on schedule, it lands in the yard as a fat reanimation candidate the turn after you cast it. Read straight, it is a colorless beater with an expiration date that any colorless deck can run as cheap pressure. Read sideways, it is fodder that happens to demand a block first. The forced sacrifice is the tension the whole card turns on: a downside in a fair board state, an upside the moment you have somewhere for the body to go.