Does a breach's bonus damage apply once per spell or once per damage instance?

Question

Accepted Answer

Once per damage instance. A single-hit spell such as Fiery Torrent gets the bonus once; a multi-instance spell such as Double Tap gets it on each instance; and a spell like Crystallize that is cast once gets it once however many gems it reveals.

Aeon's End: War Eternal

Does a breach's bonus damage apply once per spell or once per damage instance?

Aeon's End: War Eternal

Does a breach's bonus damage apply once per spell or once per damage instance?