Excal-heim
Immutable Form. The creature is immune to any spell or effect that would alter its form.
Magic Resistance. The creature has advantage on saving throws against spells and other magical effects.
Morbid Construction. The creature has advantage on saving throws against being charmed or intimidated, and magic can't put it to sleep.
Drops: Great Mace(2d12, str 19)
Multiattack. The creature makes three attacks.
Great mace. Melee Weapon Attack: +7 to hit, reach 10 ft, one target. target makes a DC 16 Str save, Fail; thrown 20 ft, landing prone.
Hit: 18 2d12+4 bludgeoning damage.
Arm Cannon. Ranged Weapon Attack: +7 to hit, range 90/270 ft, one target. Disadvantage to hit creatures within 10 ft.
Hit: 19 4d6+5 piercing/lightning damage.