Reactive Armor: set it as a free action on the start of your turn
1. 1d8 and subtract this number from all damage
2. Reroll Saving Throws and take the higher result even when you have advantage
3. +2 AC
3x Jump pack: Can use it's rocket pack to double it's jump range. Uses a charge.
Insulated Atmosphere: As long as the cockpit it intact the rider cannot be targetted. The cockpit starts to crack when it has 1/3 of it's hitpoints left and it takes damage with every hit. Cockpit has 30hp and AC25 when targetted directly.
It makes 2 arm attacks and a melee attack.
Arm weapons:
A steam-powered suit made from reinforced steel plating with a tempered glass dome so the rider can see out. Standing 3 meters tall and wide it clunks around with suprising speed and dexterity. It has weapons mounted on it's arms.
It's piloted by a small or medium creature. It uses the Intelligence, Wisdom and Charisma of the rider.