Just like Wizards, each Evil Wizard spawns with a random Element, with Magic having a 50% chance of being chosen while the others have equal probabilities, wearing a full set of Wizard Armor and a Magic Wand of that element. Each Evil Wizard also spawns knowing 5 spells: Magic Missile, Heal (or Greater Heal for Healing Evil Wizards) and 3 random spells from its element (or random elements if the Evil Wizard's element is Magic). The Magic Wand an Evil Wizard wields is always strong enough to cast all spells it knows.
Evil Wizards will attack nearby players and Wizards on sight, using the spells it knows to do so.
When killed it drops 3-5 Magic Crystals and has a 5% chance of dropping a Spell Book instead of the 2% chance of other monsters. If it spawned in a Wizard Tower there will also be a Chest full of loot in it.