Cryptothrall

Hexproof is normally a self-protecting keyword: the creature that carries it shrugs off targeted removal. Protector inverts the address. This 3/3 extends hexproof to every other artifact creature you control while conspicuously leaving itself exposed, turning the body into the deliberate soft spot in an otherwise untouchable board. An opponent staring down a wall of protected constructs has exactly one legal target for a removal spell, and it is the anchor holding the protection up. Kill it and the shield drops; leave it and the shield holds. The design borrows a shape white and green have used for years (the lord that grants a keyword to a creature type) but reroutes it through the artifact-Construct chassis, where the granted ability is the one that most directly answers spot removal rather than pumping stats. It rewards a board wide enough that the hexproof matters and punishes overcommitting to the single point of failure. The result is a card whose value scales entirely with what surrounds it: alone, it is a 3/3 with a dead ability; inside a dense artifact-creature deck, it converts the whole team into something an opponent can only answer through combat, sweepers, non-targeting effects like edicts, or by digging past it to the one throat it cannot protect, its own.