Twin Strike

Cult of Rakdos Spell
Level 5
Casting Time: Action
Duration: Instant
Range: 60 ft (?)
You fire two blasts of magical energy, one fire and one necrotic. Make two ranged spell attack against a target(s) in range. The first deals 4d8 Fire on a hit and the other deals 4d8 Necrotic on a hit.
Hellbent: If you use your last spell slot(s) on casting this spell, the attacks have Advantage and the damage is 6d8 Fire and 6d8 Necrotic