Deathtouch. A creature hit by a melee weapon attack from the engine must succeed on a DC 21 dexterity saving throw, taking 21 (6d6) slashing damage on a failed save or half as much damage on a successful one.

Lifelink. When the engine deals damage to a creature with one of its attacks, it regains a number of hit points equal to half the damage dealt.

Multiattack. The engine makes two attacka: one bite and one slam.

Bite. Melee Weapon Attack: +13 to hit, reach 5 ft., one target. Hit: 23 (4d6 + 9) piercing damage.

Slam. Melee Weapon Attack: +13 to hit, reach 10 ft., one target. Hit: 20 (2d10 + 9) bludgeoning damage.

Split. If the engine is reduced to 0 hit points it splits into two engine spawns, one of each type. Each one has its own initiative and act on its own turn.

The engine can't split if its body is destroyed by a disintegrate spell or similar.