Obsidian Golem
Large construct, neutral
Armor Class
18 (natural armor)
Hit Points
142 (15d10 + 60)
Speed
40 ft.
STR
20 (+5)
DEX
8 (-1)
CON
18 (+4)
INT
3 (-4)
WIS
10 (+0)
CHA
1 (-5)
Damage Immunities
poison, psychic; bludgeoning, piercing, and slashing from nonmagical weapons that aren't adamantine
Condition Immunities
charmed, exhaustion, frightened, paralyzed, petrified, poisoned
Senses
darkvision 120 ft., passive Perception 10
Languages
understands the languages of its creator but can’t speak
Challenge
7 (2,900 XP)
Magic Resistance. The golem has advantage on saving throws against spell and other magical effects.
Magic Weapons. The golem’s weapons are magical.
Molten Core. Whenever a creature with 5ft. deals 20 damage or more to the golem in a single round of combat, a spray of lava erupts, dealing 11 (2d10) fire damage to the attacker.
Actions
Multiattack. The golem can use its Molten Surge if available. It then makes two slam attacks.
Slam. Melee Weapon Attack: +8 to hit, reach 5ft., one target. Hit: 14 (2d8 + 5) bludgeoning damage, and the target is grappled (escape DC 15) if it is a Large or smaller creature. Until this grapple ends, the target is restrained, and the golem can’t use its slam on another target. The golem can have one target grappled with each fist.
Molten Surge (Recharge 5-6). Until the end of its next turn, the golem deals an additional 10 (3d6) fire damage with each of its slam attacks.
Smelt Intruders (1/Day). If the golem has a creature grappled in both of its fists it can use this ability to attempt to turn them to molten puddle. The golem is programmed to use this only for max efficiency so it will wait until it holds 2 targets to use it. Each grappled creature makes a DC 15 Constitution saving throw, taking 36 (8d10) fire damage on a failed save, or half as much as a successful one. If this damage reduces a creature to 0 hit points, its body becomes a puddle of molten flesh.