The Earth Demon is the first demon-type enemy encountered in the game. He's found in the Catacomb, flying back and forth. He raises his arm to his face, then a small wisp of smoke rises from the ground. A wave of earth stalagmites follows a moment later, moving in Nathan's direction. However, the wave can be easily jumped over and doesn't change direction once it begins.
The Flame Demon is able to harness fire in his attacks. He'll call upon six spheres to surround him, and then send them out in a spiral direction. Alternatively, he can summon several fireballs which move randomly. Unlike the spheres, the fireballs can be destroyed. Both will burn Nathan upon contact.
The Ice Demon is the second-strongest elemental demon in the game. He attacks by sending huge ice chunks toward Nathan; however, these can be destroyed. Many consider the Ice Demon as the most difficult of the Elemental demons to fight because getting hit by any of the ice boulders will freeze Nathan, and getting hit while frozen will take out a lot of HP. Another factor to this is that the area that the Ice Demon is encountered in has a naturally dangerous water system that will deal heavy damage to even a Fighter while frozen, though this can be countered by bringing the Cleansing magic item beforehand.