The magic used by the Kurr'd-ah is probably the most terrifying thing about them. Kurr'd-ah mages channel the ether through brute force, and appear to release the Backlash through the fabric of reality itself. Instead of taking damage themselves, the mages warp the world around them, resulting in strangely colored lights, inanimate growths, and other weirdness. This can have a detrimental effect on the environment, but for all practical purposes, it removes the major limit on spellcasting for Kurr'd-ah mages.
The Kurr'd-ah do appear to have limits, however. The amount of raw energy which a spellcaster can control is finite, and a mage trying to draw too much power loses control, though still warps reality around himself. This means that Kurr'd-ah mages, while able to mimic Elemental and Faerie spells, and even make them a little more powerful, are unable to perform massive feats of magic unaided. The horrors of the Magi Wars have thus far been spared from Gaia this time, though the reality warping effect has caused massive damage to the landscape.