Pilot. The Stahlmaster requires a Medium humanoid to pilot it. While inside the Stahlmaster, the pilot uses the vehicle’s speed and action options and can’t take reactions or use bonus actions, and the pilot has total cover. If the Stahlmaster drops to 0 hit points, the pilot is ejected from it and lands prone in an unoccupied space within 10 feet of the vehicle.

Multiattack. The Stahlmaster makes one ranged attack and one Sweeping Strike, or two melee attack and one ranged attack.

Slam. Melee Weapon Attack: +6 to hit, reach 5 ft., one target. Hit: 9 (1d10 + 4) bludgeoning damage.

Sweeping Strike. The Stahlmaster spins it's torso making every creature within 5 ft make a DC 14 Dexterity Saving Throw on a failed save taking 5 (1d10) bludgeoning damage and being knocked back 20 ft, or taking half damage and not being moved on a successful one.

Shoulder-Mounted Crossbow. Ranged Weapon Attack: +2 to hit, range 30/120 ft., one target. Hit: 6 (1d12) piercing damage.

Extendable Arms. Melee Weapon Attack: +6 to hit reach 10 ft, two targets. Hit 9(1d10 + 4) bludgeoning

Seeker Seed.  As a bonus action, after a creature is moved forcibly within 10 ft of the Stahlmaster the Stahlmaster fires an Explosive Seed at the moved creature dealing 2 (1d4) piercing damage and at the start of the creatures turn (1d6) fire damage to it and every creature within 5 ft of the marked creature.

Escape Protocol. When the Stahlmaster reaches 0 hit points, it casts the Fog Cloud spell centered on itself.

The Stahlmaster can take 3 legendary actions, choosing from the options below. Only one legendary action option can be used at a time and only at the end of another creature's turn.

Oil Spill! The Stahlmaster casts Grease with a range of 20 ft instead of 60.

Extended Sweep. The Stahlmaster takes the Sweeping Strike Action, except instead of 5 ft every creature in 10 ft must make a saving throw and every creature that fails is knocked 40 ft.

Evasive Maneuvers. The Stahlmaster takes the disengage action and can move up to 30 ft