Battery Pack

once per turn, when you make a melee attack, you can use a number of charges up too to your intelligence mod to add 2d4 damage per charge to the attack.

as a reaction, when hit with a melee attack you can spend a number of charges equal to your int mod to deal 1d6 lightning damage too the attacker per charge

as an action, you can spend a number of charges up too your int modifier to cast a 50 foot long line of lightning dealing 1d6 damage per charge. dex save dc15.

as a bonus action you can convert a spell slot into a number of charges equal to the spells level

can have a number of charges equal to half your artificer level plus your int mod

a spellcaster can convert slots into charges with 1 minute of concentration. if not attuned there is a 50% chance they lose the spell slot and don't get the charges

if you are hit with a lightning spell while you have a shield equipped, you gain charges equal too half the spells level (min of 1)

Notes: Damage: Lightning, Damage: Lightning, Damage: Lightning, Requires 2 attunement slots to use. Only attunable by artificers.