Gravelgill Axeshark is a common Creature — Merfolk Soldier card from Shadowmoor (SHM), collector number 164. Current market price: $0.21 (foil $0.40), TCGplayer market prices via Scryfall.
Persist (When this creature dies, if it had no -1/-1 counters on it, return it to the battlefield under its owner's control with a -1/-1 counter on it.)