Phantasmal Abomination
The fragility is the whole bargain. A 5/5 for would be an absurd rate if you could ever do anything with it, and the sacrifice trigger is the price the body pays: anything that targets it, including your own spells, ends it on the spot. That collapses the usual ways a wall earns its keep. You cannot pump it, regenerate it, or hang a protective aura on it; the moment a spell or ability points at the creature, it folds. The Illusion subtheme runs on exactly this trade, oversized stats sold cheap with a self-destruct clause stapled on, and this is the defensive end of that line: pure Defender, no offense, a five-toughness gate that stonewalls anything without flying or trample. The honest read is that it does not actually tax the opponent's removal. It dies to any targeted spell, and plenty of those cost one or two mana or live on a permanent as a repeatable ability, so clearing the wall is rarely a real expenditure. What it buys is a clock-resetting blocker to reach a later turn intact, holding the ground floor without trading creatures or spending counterspells on attackers. It overperforms in the blocking step and does nothing else, and the second the game asks it to interact with anything, even a friendly spell, it is gone.
