Ryusei moves out of the way, but in actuality, he has nowhere to go.
Though he dodges from the flaming ball of destruction that descends from the heavens, he's sandwiched between two rabid Summoned Heroes that only see red. One wields an enchanted war-ax and the other rushes at him with a spear.
Cassander steps in front just in time, calling upon a shield of ice. Shattering crystals in his palms, he also summons wind to blast their assailants away.
It's not enough.
The wind feeds into the war-ax's fire. The Summoned Hero does not care that her arms get licked by flames, her clothes catching fire. She hollers like an enraged wolf, snarling and snapping. The ax comes down on the barrier, shattering it.
Cassander is met with the sharp point of a spear.
Another fireball is soon descending.
There's no time. They cannot react.