Elemental Investure

As you cast the spell, you imbue yourself with a measure of replenishing, elemental arcane power. The type of gem you use during the casting determines the type of damage this spell deals: if you use a sapphire, it deals lightning, a ruby deals fire, a topaz deals acid, a diamond deals cold, and an emerald deals poison. While the spell is active, the gem glows with Arcane energy, and as an action, you can fire a bolt of whatever energy you choose at a target within 120’. Make a spell attack roll. On a hit, the target takes 2d12 points of the appropriate damage type.