Ixalli's Diviner is a common Creature — Human Druid card from Foundations Jumpstart (J25), collector number 675. Current market price: $0.24, TCGplayer market prices via Scryfall.
When this creature enters, it explores. (Reveal the top card of your library. Put that card into your hand if it's a land. Otherwise, put a +1/+1 counter on this creature, then put the card back or put it into your graveyard.)