Witch Bolt

{p/w}{p/g} Concentration Attack Spell
On hit, target takes 1d12 Lightning Damage
You can use your action to sustain the spell for a further 1d12 on subsequent turns.
Concentration spell ends after 1 minute, if target leaves sight/range, or you use another action.
1d12 Lightning. Attack Bonus—
Extra 1d12 on hit for each level empowered