Caan Worm

Fortification. When the Caan worm uses its Infest action, the target gains the following benefits as long as the Caan worm remains inside it:

• If its Strength score is equal to 10 or above, its Strength score increases by 2. If its Strength score is below 10, its Strength score is set to 10 instead.
• If its Dexterity score is equal to 10 or above, its Dexterity score increases by 2. If its Dexterity score is below 10, its Dexterity score is set to 10 instead.

Bite. Melee Weapon Attack: +3, reach 5 ft. Hit: 2 Piercing damage. 

Infest. Dexterity Saving Throw: DC 13, one Small or larger creature the Caan worm can see within 5 feet. Failure: The target is possessed by the Caan worm; the can worm disappears, and the target has the Incapacitated condition and loses control of its body. The Caan worm now controls the body, but the target retains awareness. The Caan worm can’t be targeted by any attack, spell, or other effect, except ones that specifically target Aberrations. The Caan worm's game statistics take on the target's statistics, except as noted in the Fortification trait.

The possession lasts until the body drops to 0 Hit Points, the possessed target takes Cold or Fire damage, or the Caan worm uses a Bonus Action to end the effect. When the possession ends, the Caan worm appears in an unoccupied space within 5 feet of the target, and the target is immune to this Caan worm's Possession for 24 hours. Success: The target is immune to this Caan worm's Possession for 24 hours.

Unearthly Evasion. The Caan worm uses the Dodge action. It cannot use this ability if it is possessing a creature.

Eject. Trigger: The Caan worm leaves a creature's body. Response: The Caan worm moves up to its walking speed toward another creature.