Karlaia has finally removed her hear scarf and revealed her lovely set of horns. Don't worry, she's not a demon or some sort of goat girl, she's just a Tiefling. One of the new playable races in the new D&D game.
Karlaia has conjured a Flaming Sphere to attack the Kobolds. This is a first level wizard's daily power that generates a ball of flame that the wizard can move around the battle field and attack the enemy. Just being next to the flame causes some damage, but getting hit by one really hurts.
If you don't know what Ersaor did to Karlaia, you haven't been paying attention. Go back to the begining and read the whole story.