You charge the bag with Oblivion energy, and it reduces to a 1-inch dark sphere, which you can then direct to float anywhere within range. When the spell ends, either because your concentration is broken or because you decide to end it, the bead detonates into an explosion of shards of Oblivion energy. Each creature in a 20-foot-radius sphere centered on that point must make a Dexterity saving throw. A creature takes 12d6 force damage on a failed save, or half as much damage on a successful one.

The energy damages objects in the area, including carried objects held facing the blast, at the DM’s discretion, a successful save using the Armor Class of the object reducing damage by half.

At Higher Levels. When you cast this spell using a spell slot of 8th level or higher, the damage increases by 1d6 for each slot level above 7th.