Omni-Changeling is a uncommon Creature — Shapeshifter card from Lorwyn Eclipsed (ECL), collector number 62. Current market price: $0.32 (foil $0.44), TCGplayer market prices via Scryfall.
Changeling (This card is every creature type.) Convoke (Your creatures can help cast this spell. Each creature you tap while casting this spell pays for {1} or one mana of that creature's color.) You may have this creature enter as a copy of any creature on the battlefield, except it has changeling.