Power Bolt (5e Spell)
From D&D Wiki
|Casting time:||1 action|
|Duration:||Concentration, up to 1 minute|
A brilliantly shining white bolt of energy flashes from your hand and flies towards a creature or object within range. Make a ranged spell attack against the target. If the attack hits, the creature takes 20d6 force damage and is stunned until the end of your next turn. A creature reduced to 0 hit points by this spell dies instantly, vaporized by the unrelenting power of this spell.
As an action on each of your turns until the spell ends, you can hurl another bolt of energy.