Sharktocrab is a uncommon Creature — Shark Octopus Crab card from Ravnica Remastered (RVR), collector number 222. Current market price: $0.30 (foil $0.36), TCGplayer market prices via Scryfall.
{2}{G}{U}: Adapt 1. (If this creature has no +1/+1 counters on it, put a +1/+1 counter on it.) Whenever one or more +1/+1 counters are put on this creature, tap target creature an opponent controls. That creature doesn't untap during its controller's next untap step.