Creation's Ember

Your eyes briefly flash with the Golden Flame of Creation as you plant Creation's Ember upon your target. Make a melee spell attack. On a hit the target is marked by the Golden Flame of Creation for the duration of the spell. The radiating pain of the mark causes the target creature to roll a d4 and subtract it from any saving throws it makes. Creatures resistant or immune to radiant damage suffer no ill effects from the mark. Creatures vulnerable to radiant damage roll 2d4. If the spell ends early the mark bursts forth with fragments of golden flame dealing 1d4 radiant damage to the marked creature.