Battlemages have an interesting form of magic, they have originally 3 school but the later series add Dark Magic, that are
i. Chaos - magic that bring chaos into the world. It basically fire magic but also summoning demons, temporary healing buff by sacrifice allies, steroid buff, fire buff, melting armor, blind eyes, increase movement speed, summoning meteor, burning ground, fire ball
ii. Energy - the essence of magic, basically lightning but also include summon warrior spirit, freeze enemy, frost breath buff, force field, lightning weapon buff, mana regen, "tower" attack (cast on ground lightning strike everyone), storm, mind control, summon lesser spirit that can help in battle or stationed nearby nodes that will give you mana regen boost
iii. nature - Elven magic, basically healing but also include summon forest sprite, poison ball, entangling roots, shield buff, poison fog, revive dead allies and enemy temporarily, cure poison, spreading diseases, poison weapon buff
iv. Dark Magic - evil magic, basically involving undead but include, healing undead, bone spear, bone armor, summon undead, revive undead, curses, buff, and so many things i don't remember