Sphinx of Magosi

A mana sink with no ceiling, built so that flooding out becomes the win condition. The triple-blue cost on a six-drop already signals a deck committed to surviving into the late game, and the payoff is what the leftover mana buys: each two-and-a-blue investment refills your hand and grows the body at once, so untapped Islands convert directly into both cards and clock. There is no shroud, no protection, no haste, so the design leans entirely on the strength of a 6/6 flier that turns every spare blue source into another card and another point of evasive damage. The activated ability asks nothing of the board and targets nothing, which makes it remarkably hard to interact with on the way down: a removal spell aimed at the Sphinx in response to the activation still leaves you holding the drawn card, because the draw never depended on the creature surviving. This is blue's inevitability rendered as a creature, closing games through accumulation rather than tempo: the question is never whether the Sphinx ends the game but how many cards you stockpile on the way there. Removal answers it cleanly enough on an empty stack, which is the honest price for a body that, left alone for two or three turns, simply ends the conversation.