Wild Leotau

A 5/4 for four mana in green is well past the curve for its era, and the upkeep tax is the bill that comes due for it: every turn you keep the Leotau, you spend a green source you cannot spend on anything else. That is the whole tension. The body wants to be a beater, but the recurring drain pulls against the rest of your turn, so the card punishes the same explosive starts it enables. It belongs to the old lineage of green creatures whose stats outrun their cost only because an ongoing upkeep payment claws some of the value back: cumulative-cost monsters, the Force of Nature line, the sacrifice-unless-you-pay beaters that asked you to ransom your own threat each turn. Here the ransom is small, a single green mana, which makes the Leotau more forgiving than its ancestors but never free. The strategic question it poses is timing: against a fast clock the tax barely registers because you are racing anyway, but in a grind it quietly competes with everything else you want green mana to do, and a tapped-out turn means the Cat walks itself to the graveyard.