Druidic Smite

Calling forth the power of nature, you manage to call upon the power of Mielikki, the goddess of forests, who imbues your melee weapon with pure natural energy. When your weapon hits a target in this state, the creature must make a Constitution saving throw. Roll a number of d10's equal to your spellcasting modifier (minimum of 1). The target takes the full damage on a failed save, and half as much on a success.

When used as a 6th level spell or higher, add an additional d10 to the damage roll.