PHB

Shocking Grasp

0-level (Cantrip) Evocation

Lightning springs from your hand to deliver a shock to a creature you try to touch. Make a melee spell attack against the target. You have advantage on the attack roll if the target is wearing armor made of metal. On a hit, the target takes 1d8 lightning damage, and it can't take reactions until the start of its next turn.
At higher levels: The spell's damage increases by 1d8 when you reach 5th level ( 2d8 ), 11th level ( 3d8 ), and 17th level ( 4d8 ).