Create Bomb

You touch an object no more than 10ft in any direction and imbue it with energy from the elemental plane of fire. When another creature touches this object or you dispell it, the object explodes, each creature in a 20ft radius sphere centered on the object must make a dexterity saving throw. On a failed save the target takes 4d6 fire damage, or half as much in a successful one.

At Higher Levels. When you cast this spell with a spell using a spell slot of 3rd level or higher, the damage increases by 1d6 for each spell slot level above 2nd.