Elvish Aberration is a common Creature — Elf Mutant card from Duel Decks: Elves vs. Inventors (DDU), collector number 4. Current market price: $0.16, TCGplayer market prices via Scryfall.
{T}: Add {G}{G}{G}. Forestcycling {2} ({2}, Discard this card: Search your library for a Forest card, reveal it, put it into your hand, then shuffle.)