Clockwork Guardian (5e Creature)
From D&D Wiki
Huge construct, same alignment as its summoner
Damage Resistances bludgeoning, piercing, and slashing from nonmagical attacks
Guardian Construct. The Clockwork Guardian can use a reaction to block incoming damage for its summoner if they are within 10ft of it, taking half of the damage the creature would take.
Magic Weapons. The Clockwork Guardians weapon attacks are magical. Any ranged attack summons its projectile as part of the attack.
Perfect Clockwork. The Clockwork Guardian has advantage on CON checks and saves.
Multiattack. The Clockwork Guardian makes two melee attacks, or two ranged attacks, or one melee attack and one ranged attack.
Halberd. Melee Weapon Attack: +STR modifier+its summoners proficiency bonus, reach 10 ft., one target. Hit: 3d8 + STR modifier slashing damage.
Arm-Ballista. Ranged Weapon Attack: +DEX modifier+its summoners proficiency bonus, range 80/320 ft., loading, one target. Hit: 3d8 + DEX modifier piercing damage.