The Spellbook is the primary casting menu, through this menu, various spells can be accessed and cast by the user. Blizzard is focusing on an "easy-interface" based around allowing the player the quickest access to their spells. Currently, the Spellbook icon resembles the Journal of Brann .

As you can see from the image to the left, te Spellbook is in pages, each "page" currently holds 10 spells. Since we do not know how many spells will be available to the neophyte or master magus, but to obtain the maximum number of spells of your class, you will probably need multiple pages of spells.

Since the World of Warcraft is a class-based game, there will probably be multiple casting-classes. The two most predominant classes in the Warcraft world are the Wizards of Lorderon and the Shaman of the Orcish Horde. In WoW, Wizards will probably be more offensive-magic based as in many other MMORPGs. Shaman in Warcraft 3 tend to have direct-damage spells, but fewer or ones that are more sporadic and uncontrolled. Magic in WoW will probably be faster than in other MMORPGs as it is Blizzard's goal to make all players feel powerful and reduce magical regeneration downtime.

Damage Over Time (DOT) are spells which cause a target(s) to take damage over a certain pre-allocated period of time.

Direct Damage ( DD ) refers to spells which are used to damage opponents instantly in a single burst. For example, imagine a wizard casts a fireball at an enemy, that enemy promptly takes damage. Direct damage spells come in two varieties.

Buffering Magic ( Buffs ) spells are used for multiple purposes. "Buffs" enhance or degrade a specific quality or multiple traits of a character or monster. For example, the Bloodlust spell (unconfirmed) enhances a characters metabolism, increasing the attack speed and damage of a character. Buffs do not last however and their durations have various ranges.

It's good to keep allies buffed whenever possible, they will like you for it. There are also negative buffs which are good in Player-versus-Player games and against difficult monsters. Buffs can come in LOS, Area effects, and party effects, but the two latter ranges are rare in MMORPGs.

Healing Magic is usually used by priests and clerics, but there are exceptions in many games. Healing spells do exactly what they sound like, they heal players and cure them of diseases. Healing magic tends to come in line-of-sight, area, or party spells.

Line-of-Sight Damage ( LOS ) is a spell which affects a single target and usually requires a direct view of the target. Spells like shock missiles and heal are good examples of this, if you cast them and they hit a wall, they simply fizzle.

Area-Effect Damage Spells (AOF) are spells which can be cast and effect multiple targets within an area of the spell. For example, if you cast a Blizzard spell, not only is the creature you targeted/cast near damaged, but also creatures within a defined radius.