Meryl Winterstorm cast the most appropriate spell, rather than the most powerful one. The most powerful spells often required lengthy preparation, and in a real battle, no one gave you time to prepare.
Meanwhile, Chromie made her move as well.
As an adult Bronze Dragon, Chromie had spent a long time traveling through tangled timelines. She had seen, or at least heard of, almost every powerful being in this world. Kathranatir was naturally among them.
She knew all of Kathranatir's stories, knew the terrifying feats this high-ranking Dreadlord had accomplished, and knew they absolutely could not let him escape. Now, while he was weakened, was their best chance to kill him once and for all.
Chromie opened with the Time Magic she excelled at: Time Stop!
Shawn made his move too.
Of course he knew who Kathranatir was, and he understood all too well how terrifying the Dreadlord could be.
He knew that against an opponent this powerful, they had to strike first. They could not waste a moment.
So he opened with the strongest means currently at his disposal.
He took out the Soulbinding Staff and summoned the soul of the Green Dragon Taerar.
Even as a soul, Taerar still possessed strength beyond that of any High-Rank Professionist.
Immediately afterward, Broll, Med'an, and Olivia joined the attack.
Broll was already an Archdruid, and he used the Nature Magic he excelled at.
Med'an seemed proficient in almost every kind of Arcane Magic. He unleashed a bewildering assortment of magical attacks without repeating a single one, even casting several spells simultaneously.
Olivia was a Dragon Knight, but at her core, she was still a Warrior. Until she fully mastered the Black Dragon bloodline within her and could transform into a Black Dragon, all she could do was charge at Kathranatir with