[Ivellios Siannodel]

Easy, though roundabout way to kill Firkragg using a Mage of some type. Tell Firkragg you'll kill him later. Cast as many skull traps you can cast from memory and scroll around the huge beast, being careful not to set them off. Next, summon a few monsters to stand near the skull traps, then cast as many lower resistance spells you can cast. He turns hostile, advances toward the summoned monsters and gets blown up by a chain reaction of skull traps while you stand in the corner and laugh. If he doesn't die from the skull traps, a cloudkill sould finish him off.