Mesmerizing Benthid is a mythic Creature — Octopus card from Ravnica Allegiance (RNA), collector number 43. Current market price: $0.52 (foil $1.30), TCGplayer market prices via Scryfall.
When this creature enters, create two 0/2 blue Illusion creature tokens with "Whenever this token blocks a creature, that creature doesn't untap during its controller's next untap step." This creature has hexproof as long as you control an Illusion.