Advanced Mithral Golem

Fire Absorption. Whenever the golem is subjected to fire damage, it takes no damage and instead regains twice the number of fire damage points 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.

Specific Design. The golem has advantage on saving throws against attacks from any kind of Beast or Druid. The Golem also has advantage on attacks against Druids and Beasts of all kinds. This includes any Druids in Beast Shape.

Multiattack. The golem makes two melee attacks.

Slam. Melee Weapon Attack: +18 to hit, reach 10 ft., one target. Hit: 24 (4d8 + 7) bludgeoning damage.

Sword. Melee Weapon Attack: +18 to hit, reach 10 ft., two targets. Hit: 33 (4d12 + 7) slashing damage.

Reboot. The golem releases fire in a 10ft radius around itself. The flames last for 1 turn. All entities within this radius must make a DC 15 Constitution saving throw, or be pushed back 10ft, and take 2d8 fire damage. The golem is unable to move for 4 turns after this action is used. This action can only be used once every 10 minutes.

Reckless Charge. The Golem will rush 40ft in any direction, and will not be stopped by anything excepting it's master. Anything that is within the Golem's way will have to make a DC 20 Strength saving throw, or be knocked prone and take 4d6 force damage. The Golem is immune to attacks while it is charging.

Admantine Core. The Golem will lock-down, and will act as a solid object for 10 turns, as well as a temporary AC of 30. After the 10 turns are over, it has advantage on all of it's attacks for two turns. During the 10 turns of stillness, the golem's on action is to Reboot. Each Reboot adds 1 damage to it's first attack after the golem is released from it's 10 turns of stillness, and the recharge on Reboot is not in effect while Admantine Core is being used. This action is only able to be used once every 5 minutes.