Transmute Bomb

Any object you touch becomes a bomb. Make a melee spell attack against an object you wish to turn into a bomb. On a hit, you fill this object with potential energy, ready to burst out at any moment. This spell does not alter the object's appearance, and the object functions normally until the bomb detonates.

You can choose to detonate this bomb after a set amount of time or when a specific condition is met (such as when a certain creature enters the bomb's range or if someone touches it). You can choose how the bomb is triggered when you cast the spell. You can also trigger the bomb manually at any time as a reaction. You can change how the bomb is triggered by casting this spell on the same object again. You cannot detonate this bomb on the same turn that you created it.

When you detonate the bomb, the object takes 4d10 force damage, and each creature in a 20-foot-radius sphere centered on that point must make a Dexterity saving throw. A target takes 8d6 fire damage on a failed save, or half as much damage on a successful one. The bomb automatically fails this saving throw. Creatures within 5 feet of the bomb when it detonates (not including the bomb itself) take an additional 2d10 force damage, which is also halved on a successful save. Any object or creature that takes force damage from this spell is disintegrated if this damage leaves it with 0 hit points. The spell ends after the bomb detonates.

A disintegrated creature and everything it is wearing and carrying, except magic items, are reduced to a pile of fine gray dust. The creature can be restored to life only by means of a true resurrection or a wish spell.

At Higher Levels. When you cast this spell using a spell slot of 6th level or higher, the force damage increases by 1d10 and the fire damage increases by 1d6 for each slot level above 5th. When you cast this spell using a spell slot of 7th level or higher, you can target a creature with this spell. This creature can make a Charisma saving throw to resist this spell's effect, and can use their action on subsequent turns to attempt this save again.