Tromokratis is a rare Legendary Creature — Kraken card from Commander Legends (CMR), collector number 408. Current market price: $0.33, TCGplayer market prices via Scryfall.
Tromokratis has hexproof unless it's attacking or blocking. Tromokratis can't be blocked unless all creatures defending player controls block it. (If any creature that player controls doesn't block this creature, it can't be blocked.)