Child of the Volcano is a common Creature — Elemental card from The Lost Caverns of Ixalan (LCI), collector number 140. Current market price: $0.12 (foil $0.17), TCGplayer market prices via Scryfall.
Trample At the beginning of your end step, if you descended this turn, put a +1/+1 counter on this creature. (You descended if a permanent card was put into your graveyard from anywhere.)