Chattering Skulls

As you hold your palms out, fingers outwards, and say 'Chattering Skulls,' a black ethereal skull, with emerald fire in its eyes bursts forth from each palm, jaws chattering manically, and fly in tight spirals to your target/s, shattering on impact in a flash of dark green fire, dealing 1d8 necrotic damage per skull. 

Until your next turn, any attacker will have advantage to hit against your target. 

At higher levels, the caster will be able to call upon more skulls, +1 per level above first. 

As well as this, starting at level 2 of the spell, the caster will be above to combine the skulls, creating a Cackling Skull, rolling d8s depending on how many Chattering Skulls were merged.