Armageddon Pastry

This innocuous looking cinnamon roll is, in fact, a highly unstable thermonuclear device. If bitten into, it triggers an instant disintegration effect in a 100 foot burst.  Any creatures within range must make a Constitution saving throw (DC 30) taking 20d6 fire damage and 20d6 force damage on a failed save, half on a successful one.  Any building or structure in which the Armageddon Pastry detonates is reduced to a smouldering crater.

This item is a modification from the item in "The Mask of Death" module.