Disrupt Undead

You cause radiant energy to engulf up to three targets within range. The target must make a Constitution saving throw. On a failed save, if the target is undead and it's CR is equal to or lesser then the level of spell slot used to cast this spell, it is destroyed as it crumbles into dust. On a successful save, it can only move at half of it's normal movement speed on it's next turn. Creatures with advantage against "Turn Undead" have advantage on this save. Creatures immune to "Turn Undead" ignore this spell and save automatically with no ill effects. Non-undead creatures and undead who CR exceeds the spell slot used to cast this spell are unaffected by this spell.