Kairos pointed his finger towards the monster underneath him. A fireball gradually began to form. He put as much mana as he possibly could in order to make it as large as possible, but it was only able to have a measly few meters in diameter.
Of course, it wasn't as though that was small, but compared to the fireball that was larger than the giant monster itself, it was quite underwhelming. Not to mention, that fireball from earlier still wasn't enough to kill said monster.
While he was doing that, not everybody just sat there waiting.
Eric tossed his ball connected to a string up into the air, and it rapidly began expanding into a large ball with a giant maw, lined with a large number of teeth.
Then, that large ball came down with its maw wide open, heading straight for the giant monster's head.