Sickener Beholder

Armor Class 18

Hit Points 170 (20d10 + 60)

Speed 0 ft., fly 20 ft.

Initiative +2

Damage Resistances poison

Condition Immunities poisoned, prone

Saving Throws Int +7, Wis +6, Cha +7

Skills Perception +6

Senses darkvision 120 ft., passive Perception 20

Languages Deep Speech, Undercommon

Challenge 10 (5,900 XP)

Source Monster a Day

Multiattack. The beholder makes eight stalk attacks.

Stalk. Melee Weapon Attack: +7 to hit, reach 10 ft., one target. Hit: 9 (1d12 + 3) bludgeoning damage.