Glimpse, the Unthinkable

A punchline built entirely out of the phrase "you can't," and every clause is load-bearing. Shroud walls it off from the entire targeted-removal stack, but the two lines beneath it are where the design actually earns its title: it can't be chosen, and its name can't be chosen either. That closes every backdoor a rules lawyer would reach for. Edicts asking a player to choose a creature to sacrifice cannot land on it. Effects that ask you to name a card cannot name it. Anything that resolves by selecting a permanent, a creature, or a card by name simply slides off. What remains is a 4/5 that persists as an unremovable, unaddressable object, answerable only by wraths and other targetless board-wide sweepers that require no choice at all. The humor is that a card this obnoxious is also completely honest about it: there is no hidden rate to evaluate, no timing window to exploit, just a legendary body whose rules text has been engineered to make it permanent. The title is the punchline pointing back at itself: the unthinkable thing is thinking about it, which is precisely what the third line forbids.