Nadir Kraken is a rare Creature — Kraken card from Theros Beyond Death Promos (PTHB), collector number 55p. Current market price: $0.68 (foil $1.36), TCGplayer market prices via Scryfall.
Whenever you draw a card, you may pay {1}. If you do, put a +1/+1 counter on this creature and create a 1/1 blue Tentacle creature token.