Large to Huge construct,

Armor Class: 22 (Natural Armour)

Hit Points: 230 (20d10 + 120)

Speed: 40 ft

STR

26 +8

DEX

11 +0

CON

22 +6

INT

5 -3

WIS

13 +1

CHA

3 -4

Damage Immunities: Fire, Poison, Psychic; Bludgeoning, Piercing, and Slashing from Nonmagical Attacks that aren't Adamantine and magical

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

Senses: Darkvision 90"

Languages: Elderday, Common, understands the languages of its creator but can't speak

Proficiency Bonus: +5

Actions

Multiattack: Lead Golem makes two melee attacks.   Slam. Melee Weapon Attack: +13 to hit, reach 10"., one target. Hit: 20 (3d10 + 8) bludgeoning damage.   Poison Expiration (Recharge 5-6): The Lead Golem expires poisonous gas in a 10" radius. Each creature in that area must make a DC 19 Constitution saving throw, taking 54 (12d8) poison damage on a failed save and is affected by the poison condition until the start of the Lead Golem's next turn, or half as much damage on a successful one and not be affected by the poison condition.   Rapid is the club (Recharge 5–6): The Lead Golem gains abilities of the Haste spell until the start of it's next turn. The Lead Golem’s speed is doubled, it gains a +2 bonus to AC, it has advantage on Dexterity saving throws, and it gains an additional action on each of its turns. That action can be used only to take the Attack (one weapon attack only), Dash, Disengage, Hide, or Use an Object action.   Plodding is the enemy (Recharge 5–6): The Lead Golem forces all opponents within 40" to make a DC 14 wisdom savings throw or be affected by the Slow spell until the start of the Lead Golem's next turn. An affected creature's speed is halved, it takes a −2 penalty to AC and Dexterity saving throws, and it can't use reactions. On its turn, it can use either an action or a bonus action, not both. Regardless of the creature's abilities or magic items, it can't make more than one melee or ranged attack during its turn.