Elemental Incarnate

When you cast this spell, a bright little sphere of elemental energy appears and hover above your shoulder.
Choose an element among these : fire, ice, lightning, acid, radiant, necrotic.
The little incarnate shed dim lights 30 ft around you.
As a bonus action, the incarnate can launch an elemental missile at a target within 60 ft.
Roll a ranged spell attack and the damage is 1d6 + INT modifier damage of the incarnate's element.
The incarnate has an AC equal to your spell DC and 1HP.
The incarnate is immune to non magical damage and to its chosen element.

At Higher Levels. The incarnate damage increases by 1d6 when you reach 5th level (2d6), 11th level (3d6), and 17th level (4d6)