Trinity Seven, Vol. 17: The Seven Magicians — Kenji Saito

Guttlehoge of the Twelve Demon Commanders attacks with enormous strength, forcing Hijiri and Anna to summon every iota of their magic, leaving their bodies bloodied and bruised…The two girls pour all their strength into one final, desperate gambit -- a forbidden spell that could cost them their lives! What outcome awaits them on the other side of this fight?!