Iron Golem

Large construct · CR 16

Armor Class 20

Hit Points 210 (20d10+100)

Speed 30 ft.

STR 24 +7

DEX 9 -1

CON 20 +5

INT 3 -4

WIS 11 +0

CHA 1 -5

Damage Immunities fire, poison, psychic; bludgeoning, piercing, and slashing from nonmagical attacks not made with adamantine weapons

Condition Immunities charmed, exhaustion, frightened, paralyzed, petrified, poisoned

Senses darkvision120 ft. , passive Perception 10

Languages understands the languages of its creator but can't speak

Traits

Fire Absorption.: Whenever the golem is subjected to fire damage, it takes no damage and instead regains a number of hit points equal to the fire damage dealt.
Immutable Form.: The golem is immune to any spell or effect that would alter its form.
Magic Resistance.: The golem has advantage on saving throws against spells and other magical effects.
Magic Weapons.: The golem's weapon attacks are magical.

Multiattack.: The golem makes two melee attacks.
Slam. Melee/Ranged Weapon Attack: +13 to hit.: Melee Weapon Attack: +13 to hit, reach 5 ft., one target. Hit: 20 (3d8 + 7) bludgeoning damage.
Sword. Melee/Ranged Weapon Attack: +13 to hit.: Melee Weapon Attack: +13 to hit, reach 10 ft., one target. Hit: 23 (3d10 + 7) slashing damage.
Poison Breath (Recharge 5-6). Melee/Ranged Weapon Attack: +0 to hit.: The golem exhales poisonous gas in a 15-foot cone. Each creature in that area must make a DC 19 Constitution saving throw, taking 45 (10d8) poison damage on a failed save, or half as much damage on a successful one.