Boneforged Ogre Bolt Launcher Thrall

Boneforged Body. Boneforged skeletons take the maximum result for all of their hit die. Additionally, they enjoy proficiency in Strength and Constitution saving throws.

Siege Monster. This creature deals double damage to structures and fortifications.

Skilled Undead. Unlike typical undead, these creatures have retained some of their skill that they possessed in life. They have more action and reaction options than typical undead, and may even retain certain skills.

Turn Resistance. This creature has advantage on saving throws made against effects that would turn undead.

Undead Thrall (Lv 12). This creature was created by a 12th level necromancer as a thrall, granting it +12 maximum hit points and +4 to weapon damage.

Slam. Melee Weapon Attack: +7 to hit, reach 5 ft., one target. Hit: 13 (2d4 + 9) bludgeoning damage. If this attack hits a creature that it prone, it is automatically a critical hit. A creature of medium or smaller size hit by this attack must make a DC15 STR saving throw. If it fails, it is either knocked back 5 feet or knocked prone, at this creature's choosing. 

Bolt Launcher Swing +1. Melee Weapon Attack: +8 to hit, reach 10 ft., one target. Hit: 23 (2d12 + 10) bludgeoning damage. A creature of medium or smaller size hit by this attack is knocked back 5 feet.

Bolt Launcher +1. Ranged Weapon Attack: +6 to hit, range 120/480 ft., one target. Hit: 25 (3d10 + 8) piercing damage.

Reload. After firing its bolt launcher, this creature will reload it as a bonus action.

Stomp. This creature can perform an additional slam attack as a bonus action on each of its turns. When making a slam attack in this way, the target can only be knocked prone by this attack, not knocked back.

Retaliatory Kick. As a reaction to being the target of a melee attack from a creature within 5 feet that the skeleton ogre bolt launcher can see, it may make one slam attack against that attacker. When using slam in this way, it can only knock a foe back, not prone.