Insolent Neonate

The body is beside the point; the sacrifice clause is the whole reason this exists. A 1/1 with menace can chip in the odd point of damage or trade with another small creature, but it will never win a real combat, and it isn't meant to. The activated ability does the work: a rummage stapled to a creature, and one that feeds a graveyard from both ends. Sacrificing it drops the creature itself into the bin, the discard drops a second card there on the way to drawing fresh, and the whole thing costs no mana at all, only the discard and the sacrifice. Yes, the raw math is a card down: discard one, lose the body, draw one. But a deck that wants cards in the graveyard as badly as cards in hand isn't paying that price so much as converting it. Two cards buried, a fresh draw, and a red permanent already cashed toward whatever it reanimates or flashes back. Where a creature like Merfolk Looter filters and stays on the board to be killed for value later, this one eats itself: cashing it in is the value, not a downside, and there's no dork left over for the opponent to profit from. The discarded card is fuel, the sacrifice is delivery, and the draw is the dig toward the payoff. Run as a plain one-drop beater it wastes half of what it offers; the graveyard-engine reading is the one that has kept it around.