Jungleborn Pioneer is a common Creature — Merfolk Scout card from Rivals of Ixalan (RIX), collector number 137. Current market price: $0.20 (foil $0.50), TCGplayer market prices via Scryfall.
When this creature enters, create a 1/1 blue Merfolk creature token with hexproof. (It can't be the target of spells or abilities your opponents control.)