Conjure Primordial Serpent

You conjure a primordial serpent of the Elemental Planes that occupies your space for the duration of the spell. Choose fire, cold, acid, or lightning damage. As part of casting the spell, and as an action on every turn after, you can send the serpent up to 60 feet within sight to attack a target. Make a ranged spell attack. On a hit, the target receives 2d8 damage of the type chosen on the casting of the spell.

As a reaction on being hit with a melee attack, you can command the serpent to lash out, immediately dealing 4d8 damage of the type chosen on the casting of the spell to the attacker. The spell then ends.

Using a Higher-Level Spell Slot. The damage increases by 1d8 for the action and by 2d8 for the reaction for each spell slot level above 2.