Palani's Hatcher

The engine here is a conversion machine disguised as a haste-anthem beater. Two fragile 0/1 Eggs arrive with the body, and every combat step feeds one into the grinder in exchange for a 3/3, so what looks like a five-mana 5/3 is really the front end of a token factory that keeps paying out as long as you keep supplying Eggs. The haste clause is the connective tissue: those freshly minted 3/3s do not sit idle a turn, they attack the moment they exist, which is what turns a slow value trickle into a clock. That combat-begin timing is the wrinkle worth sitting with. The Egg is spent before combat damage, so the 3/3 replaces it in time to swing, and because the trigger checks each turn you control an Egg, anything that refills the Egg supply extends the loop rather than capping it at two payouts. Green-red Dinosaurs had plenty of expensive, splashy top-end already; the design problem this answers is what the tribe does with its incidental bodies, and the answer is convert them upward and send them in immediately. It rewards a board built wide over a board built tall, and it asks you to think of small creatures as raw material rather than blockers.