Masked Meower

A one-mana body that exists mostly to be spent. The math is honest about it: discard a card, sacrifice the creature, draw a card, which is a net wash in raw card count but a live swap of one card in hand for a fresh one off the top. That trade is the whole reason to run it. It filters a stranded card into a new draw, greases a graveyard-matters plan by putting a specific card in the yard on your terms, and clears a body off the battlefield at instant speed for anything that cares about a creature dying. Haste keeps the 1/1 from ever being dead weight while it sits around: it can swing for a point right away and still be cashed in later. The cat is small, but its value comes from being a modular, sacrificeable filtering outlet rather than a threat, the kind of one-drop that rewards a deck already asking questions its top card cannot always answer.