Smog Elemental

Armor Class 15

Hit Points 135 (18d10 + 36)

Speed 0 ft., fly 90 ft.

Initiative +5

Damage Resistances lightning, thunder; bludgeoning, piercing, and slashing from nonmagical attacks

Damage Immunities acid, poison

Condition Immunities exhaustion, grappled, paralyzed, petrified, poisoned, prone, restrained, unconscious

Senses darkvision 60 ft., passive Perception 10

Languages Auran

Challenge 6 (2,300 XP)

Source Monster a Day

Multiattack. The elemental makes two slam attacks.

Slam. Melee Weapon Attack: +8 to hit, reach 5 ft., one target. Hit: 14 (2d8 + 5) bludgeoning damage plus 4 (1d8) poison damage.

Acid Rain (Recharge 6). Acid rain falls on the elemental and the area around it. Each creature within the elemental's space or 30 feet of it must make a DC 13 Dexterity saving throw, taking 18 (4d8) acid damage on a failed save, or half as much damage on a successful one.