Yoked Plowbeast
Cycling exists to solve a specific deckbuilding tax: the dead-card-in-hand problem that fat creatures create. A 5/5 for seven mana is the kind of body that wins games when the board has stalled and loses them when you draw it on turn three with nothing to do. Cycling for two is the release valve. Early, when a clumsy seven-drop is a liability, you pay two and trade it for a fresh card; late, when the board needs a wall, you cast it as a 5/5 that blocks almost anything in its weight class and trades up against most attackers. The design does not ask you to build around it; it asks nothing of the deck except that you accept a body with no evasion and no relevant text beyond its stats, in exchange for never being stuck holding it. That is the whole bargain, and it is a clean one. What carries the card is that two generic mana is cheap enough to make it function as a cantrip with a creature stapled to the back, which is exactly the floor a top-end body in a controlling white deck wants. It is filler in the most honest sense, a card whose job is to be flexible rather than powerful, and that flexibility is what earns it a slot.

