Condemning Smite

Your weapon is shrouded in whipping flames that pulsate a bright white glow while the spell lasts until you hit a creature. The spell transfers from the weapon to that creature, who takes an extra 2d10 radiant damage as part of the attack, and will continue taking this instance of damage at the start of each of their turns until the spell ends. Immediately after taking this damage on their turn, a creature can make a Wisdom saving throw, ending the effect on a success. A creature reduced to 0 hitpoints by this damage is turned to ash. 

At Higher Levels. For each level you cast this spell above third, you deal an extra 1d10 radiant damage.