Keensight Mentor is a uncommon Creature — Human Cleric card from Ikoria: Lair of Behemoths (IKO), collector number 18. Current market price: $0.19 (foil $0.34), TCGplayer market prices via Scryfall.
When this creature enters, put a vigilance counter on target non-Human creature you control. {1}{W}, {T}: Put a +1/+1 counter on each creature you control with vigilance.