Phytotitan

The recursion is the gimmick, but the body is the joke that makes it work. A 7/2 hits like a haymaker and folds to almost any blocker or burn spell, so the upkeep return clause is built to forgive exactly that fragility: kill it and it walks back the following turn, tapped, ready to attack again. The design trades the usual cost of a hard-to-remove threat (you normally pay through the nose for indestructibility or a high toughness) for a delay and a tapped reentry, which is a much cheaper currency. The wrinkle is that the return is mandatory and ongoing, which turns the card into a renewable resource in any deck built to cash in dying creatures. Pair it with a sacrifice outlet and it becomes a loop you can fire every turn cycle, a body that keeps showing up to be fed. On its own it is a slow, blunt beater that any opponent can chump or trade with all day. Built around, it is one of green's most accessible engines for repeatable death triggers, an undying creature without the counter, asking only that you accept the tapped tempo hit each time it claws its way back.