On the 18th of October, 7:00AM UTC, a new Bound Hero Battle dropped: Ephraim and Myrrh!
The event will put you against these two formidable fighters, and will grant you 9 Orbs for completion of all difficulties: Hard, Lunatic, and Infernal. The BHB will end on the 25th of October, 6:59AM UTC.
A Bound Hero Battle is always accompanied with a banner, of course.
Summoning Focus: Bound Hero battle has Eirika: Anamnesis Lady, Ephraim: Restoration Lord, and Myrrh: Great Dragon on focus. The banner will come to an end the same time as the BHB: 25th of October, 6:59AM UTC.