Chasm Skulker is a rare Creature — Squid Horror card from Commander Legends: Battle for Baldur's Gate (CLB), collector number 714. Current market price: $0.73, TCGplayer market prices via Scryfall.
Whenever you draw a card, put a +1/+1 counter on this creature. When this creature dies, create X 1/1 blue Squid creature tokens with islandwalk, where X is the number of +1/+1 counters on this creature. (They can't be blocked as long as defending player controls an Island.)
All Commander Legends: Battle for Baldur's Gate cards and prices