Minecraft Dungeons:Shulker

The Shulker is a hostile mob found in the Echoing Void. It appears similar to its Minecraft counterpart.

Behavior
Shulkers, like their base counterpart, will shoot shulker bullets at players, which deal damage. Also unlike their base counterpart, their bullets are capable of activating special contraptions. They can close their shell, which makes them take less damage. If a player shoots an arrow at a shulker when it’s shell is closed, the arrow is reflected.

Shulker Bullet
Shulker Bullets are projectiles shot from shulkers which not only deal damage, but can activate certain contraptions for the player to access certain areas. The bullets can inflict a Levitation effect upon contact. Like in the base-game, they home in on the player if it gets hit by an arrow when closed it will deflect the arrow. Shulker bullets also follow the player unless destroyed or if it wait's to long it will break. Unlike most other projectiles shot by mobs, the shulker bullets can also hit and effect other mobs with levitation.