The Black Sun of Ceres

A burning 5 foot diameter black sun appears in an unoccupied space within range. Until the spell ends, 40-foot radius sphere centered on the black sun is difficult terrain and any creature that starts it turn there must make a Strength saving throw or be pulled 10 feet towards the center along with any unfastened medium weight objects. The negative radiation from the black sun deals 2d12 necrotic damage if, a creature starts it's turn within 30 feet of the black sun and additional 1d12 fire damage if the creature starts it's turn within 15 feet of it. The damage is halved for successful save. 

If a creature or an object is reduced to 0 hit points by the spell, it's body and everything it is wearing and carrying, except Magic Items turn to ash and is consumed by the black sun.

The spell can affect through barriers, but 2 feet of rock, 2 inches of any metal other than lead, or a thin sheet of lead blocks the effects of the spell