Dancing Embers Firestorm

You summon a small twinkling ember in your palm that dances erratically toward a target of your choice within range.  The ember can find targets that have taken cover within 1 turn of casting the spell.  This negates the target's cover and eliminates the need to have line-of-sight on the target(s) even fully obscured but in a location known to you. Three additional embers then come to life from the burst of fire occurring against the first target and dance in a similar fashion from the first target to as many as three other targets; each ignoring cover so long as the location of the target is clearly known (Note: each of which must be within 30 feet of the first target). A target can be a creature or an object and can be targeted by only one of the embers.  

Clarification on "known location in cover":  A target that has taken cover behind an object, effect, or battlefield element within one turn of the casting of the spell.  Example:  4 orcs each take full cover during their action on Turn 4.  On Turn 5, when it comes time to cast the spell, their cover is ignored.  On Turn 6 their cover once again applies.   If any of the orcs come out from behind full cover (to move, attack, etc.) the one turn limitation resets.

Saving Throw:  A target must make a Dexterity saving throw. The target takes 8d8 fire damage and 2d8 concussion damage on a failed save, or half as much damage (of each damage type) on a successful one.

At Higher Levels. When you cast this spell using a spell slot of 7th level or higher, one additional ember leaps from the first target to another target for each slot level above 6th.