Corrupted Shapeshifter

You rarely know when you commit four mana whether the board wants a clock or a wall, and this card refuses to make you decide until the last honest instant. The mode is locked in as it enters, after the turn has developed: against an empty board you take the 3/3 flier and start swinging; into a swarm you take the 0/12 defender and buy every turn you need; when the game is a stalemate the 2/5 vigilance body holds the ground while it also attacks. The flexibility is real precisely because the choice lives in resolution rather than deployment. An opponent holding removal cannot punish you for guessing wrong, because you have not guessed yet; they respond to a spell whose final shape is still undetermined. Devoid is doing flavor work rather than mechanical work here (nothing on the card cares about its colorlessness beyond the type line), but the shapeshifting is the whole reason to run it. It belongs to the small lineage of creatures whose power is not a stat line but a decision deferred: the value is entirely in optionality, and the cost is that no single mode is a bargain on its own. You are paying for the right to be right, not for any one of the three bodies.