Kinsbaile Aspirant is a uncommon Creature — Kithkin Citizen card from Lorwyn Eclipsed (ECL), collector number 21. Current market price: $0.14 (foil $0.21), TCGplayer market prices via Scryfall.
As an additional cost to cast this spell, behold a Kithkin or pay {2}. (To behold a Kithkin, choose a Kithkin you control or reveal a Kithkin card from your hand.) Whenever another creature you control enters, this creature gets +1/+1 until end of turn.