Aversion to Fire. If Adam takes fire damage, he ahs disadvantage on attack rolls and ability checks until the end of his next turn. 

Immutable Form. Adam is immune to any spell or effect that would alter his form. 

Lightning Absorption. Whenever Adam is delt Lightning damage, he takes no damage and instead regains a number of hit points equal to the amount of damage delt. 

Multiattack. Adam makes 2 attacks of any available action. 

Slam. Melee Weapon Attack: +7 to hit, reach 5 ft., 1 target. Hit: 13 (2d8 + 4) [bludgeoning] damage.

Tombstone. Melee Weapon Attack: +7 to hit, reach 5 ft., 1 target. Hit: 26 (4d10 + 4) [bludgeoning] damage. A creature dealt damage with this action is stunned until the end of their turn.

Corpse Throw. RangedWeapon Attack: +5 to hit, range 45 ft., 1 target. Hit: 12 (4d4 + 2) [bludgeoning] damage.

Organ Harvest.  Adam gourges himself on a fistful of corpses laying around the the Corpse Factory and regains 13 (1d20 + 3) hit points. After taking this action Adam gains advantage on his next attack action this turn. 

Enter the description for how bonus actions work for your monster here.

Insanity Snap.  Whenever Adam starts his turn with 50 hit points or fewer, flip a coin. If the coin lands on heads, Adam snaps and goes insane. On each of his turns while Adam is insane, he gains +2 to all attack rolls. While insane, he also has access to the Tombstone and Organ Harvest Actions. Once Adam goes insane, he continues to do so until he is defeated or he regains all of his hit points. 

Enter the description for how legendary actions work for your monster here.

Legendary Action Name (Costs # Actions). Enter the description for your legendary action.

Enter the description for how mythic actions work for your monster here.

Mythic Action Name (Costs # Actions). Enter the description for your mythic action.