Super-Skrull

The design conceit is written straight into the mana requirements: this is a mono-black creature that borrows the powers of the Fantastic Four one color at a time, and every activated ability is gated behind a mana symbol drawn from a color the card itself is not. Pay white and you get the Thing's rocky durability as a Wall; pay green and it swells like Mister Fantastic stretching to size; pay red and it hurls a Human Torch fireball at a creature; pay blue and someone refills their hand on Invisible Woman's cerebral edge. What that off-color gating actually does is turn a four-mana 4/5 flier into a mana sink whose reach is measured by how many colors you can produce rather than how much black you have. A mono-black shell can cast it on curve and never touch a single ability; a wide-open manabase treats it as a Swiss-army engine that pumps, kills, defends, and draws. The tension the card resolves is a familiar one for splashy legendary bodies: how do you give a single creature the whole roster's toolkit without making it oppressive in its home color? The answer here is to keep the body honest in black and price every trick in the colors black is worst at reaching, so the ceiling belongs to greedy manabases and the floor is just a solid evasive four-drop.