Willbender

Redirection as a hidden creature: the unmorph trigger doesn't counter or fizzle anything, it simply reassigns where a spell or ability with a single target lands, which means an opponent's removal spell can be turned back onto its caster's own threat, or a burn spell aimed at your face can be hung on theirs. The face-down disguise is doing the heavy lifting. Because it sits on the board as an anonymous 2/2 before the morph cost is paid, the threat of redirection is live every time an opponent points something at a single target, and they have no way to play around what they cannot see. The window is the catch: the trigger only fires when the creature is turned face up, so the redirect has to be timed in response to the spell on the stack, paid for at the moment of greatest leverage. Anything that hits multiple targets, or no target at all, slips past it entirely, which is the restriction that holds the effect short of being a universal answer. What's left is a trap wearing the body of a vanilla bear, punishing an opponent for assuming the 2/2 across the table is what it appears to be. The whole construction depends on information asymmetry, which is exactly the design lever morph was built to pull.