The Crab Queen is a rare Legendary Creature — Crab Human card from Unknown Event (UNK), collector number RU38. Current market price: $15.00, TCGplayer market prices via Scryfall.
Whenever The Crab Queen attacks, create a token that's a copy of one of the following at random: Skitter Eel; Skittering Crustacean; Ruin Crab; Charix, the Raging Isle; Scuttletide; or Heartstone.