You summon a Forge turret, doing a damage type of your choice of the following:
Fire, Lightning, ice, air, water, poison, force, and arcane and celestial at upper levels when upcasted.
Turret cannot move from sommoning point, and can only attack once per turn. Has the same modifier to hit as caster at time of summon. turret lasts 10 turns, and its health is 8hp per level of caster.
at 1st level, turret does 1d4 damage.
at 2nd level cast, turret does 1d4 damage plus wisdom modifier.
at 3rd level cast, turret does 1d8 damage plus wisdom modifier. turret can now use a bonus action if attacked, retaliate 1d4 damage straight, whatever elemental damage that was chosen at time of summon.
at 4th level cast, turret does 2d8 damage plus wisdom modifier. retaliate does 2d4
at 5th level cast, turret can now move up to 30ft per turn, and does 3d8 damage plus wisdom modifier.
at 6th level cast, turret does 4d8 damage of initial element, plus 2d6 of either arcane or celestial damage, plus wisdom modifier. retaliate now does 2d8
at 7th level cast, turret can attack twice per turn, expending bonus action, therefore cannot retaliate that turn.
at 8th level cast, the forge turret becomes sentient, growing mechanical legs, can switch elements of attack at will, and does 4d10 damage per attack. movement speed is increased to 50 ft per turn. attacks gain advantage on opposing elements from knowledge of forging.