One weakness of summoners is the weakness they go through whenever they summon a beast. Summoning the beasts itself is not tiring, but maintaining the gate open is the problem.
It takes too much energy, and so once a person summons a beast, they stand back and wait for the beast to be completely merged with reality before deactivating the summoning gate.
This process mostly takes a couple of seconds, depending on how strong the beast is.
So the moment Kroth summoned the three beasts, Zeyrion saw the exhaustion. However, he knew if he attacked, the three beasts would interfere and defend him, so he used the most unlikely way to get what he wanted.
He provoked Kroth into summoning a second gate, which he knew a seeded candidate could do. This means the moment the second gate appeared, poor Kroth would be very weakened.
"Crystal Blizzard."
Zeyrion activated a skill, and in an instant, a blizzard covered the entire arena, causing Kroth to turn pale.
