Thicket Elemental is a rare Creature — Elemental card from Duel Decks: Nissa vs. Ob Nixilis (DDR), collector number 21. Current market price: $0.19, TCGplayer market prices via Scryfall.
Kicker {1}{G} (You may pay an additional {1}{G} as you cast this spell.) When this creature enters, if it was kicked, you may reveal cards from the top of your library until you reveal a creature card. If you do, put that card onto the battlefield and shuffle all other cards revealed this way into your library.