Gasdra

The gasdra has Advantage on Wisdom (Perception) checks and on saving throws to avoid or end the Blinded, Charmed, Deafened, Frightened, Stunned, or Unconscious conditions. The gasdra can take one Reaction for each of its heads. The extra Reactions can be used only for Opportunity Attacks.

While the gasdra sleeps, at least one of its heads is awake.

The gasdra makes three Beak attacks.

Melee Attack Roll: +4, reach 5 ft. Hit: 5 (1d6 + 2) Bludgeoning damage.