Hero of Leina Tower is a rare Creature — Human Warrior card from Born of the Gods (BNG), collector number 123. Current market price: $0.28 (foil $0.65), TCGplayer market prices via Scryfall.
Heroic — Whenever you cast a spell that targets this creature, you may pay {X}. If you do, put X +1/+1 counters on this creature.