C4: Delayed Detonation Blast

You create a small, glowing sphere of unstable explosive energy at a point you can see within range.

The sphere remains where you place it until you detonate it. On a later turn, you can detonate it as a Bonus Action, causing a 10-foot-radius explosion.

Each creature in the explosion must make a Dexterity saving throw. On a failed save, a creature takes 3d6 Fire damage + 3d6 Force damage. On a successful save, it takes half as much damage.

Delayed Detonation. The longer you wait before detonating the sphere, the stronger the explosion becomes. For every round you wait, the explosion deals an additional 1d6 Fire damage and 1d6 Force damage, up to a maximum of 3d6 additional damage of each type.

A creature that fails its saving throw is also pushed 10 feet away from the center of the explosion.