Armor Class 18
Hit Points 93 (11d10 + 33)
Speed 30 ft., burrow 20 ft.
Senses Darkvision 120 ft., Tremorsense 60 ft., passive Perception 10
Languages Umber Hulk
Challenge 5
Tunneler. The umber hulk can burrow through solid rock at half its Burrow Speed and leaves a 10-foot-diameter tunnel in its wake.
Multiattack. The umber hulk makes three Rend attacks.
Rend. m +8, reach 10 ft. Hit: 12 (2d6 + 5) Slashing damage.
Confusing Gaze (Recharge 5–6). wis DC 14, each creature in a 30-foot Cone. The target can't take Reactions until the start of the umber hulk's next turn, and the target rolls 1d8 to determine what it does on its next turn:
Monster Manual (2024), p. 312