Andromedon

Heavy Chassis.The andromedon cannot benefit from cover, and has disadvantage on stealth checks. It can walk through thin walls and destroy objects smaller itself by trampling them, no action required.

Robotic Battlesuit. When the andromedon dies, the robotic battlesuit can continue fighting as a strong melee unit (andromedon shell).

Andromedon Cannon. Ranged Weapon Attack: +7 to hit, range 60/90 ft., one target. Hit:  15 (2d6 + 8) radiant damage.

Acid Bomb (1 use). The andomedon fires an acid bomb at a point within range (20 ft). All creatures within 10 ft of the point must make a Dexterity saving throw, taking 16 (2d8+7) acid damage, or half as much on a success. All creatures who fail the save are also covered in acid, taking 5 (1d8) damage at the end of their turns. They can expend an action to remove the acid.

Fist Strike. Melee Weapon Attack: +4 to hit, reach 10 ft., all targets within slash cone. Hit: 17 (2d8 + 8) bludgeoning damage. All objects within the slash area take maximum damage.