Eastern Spellbook

The Eastern Spellbook is unlocked after completing the quest Sorcerers of the East. All spells, except the Home Teleport, require at least one void rune (in the same way all lunar spells require at least one astral rune). To switch to this spellbook, you need to pray at the void altar in the dungeon beneath the Sorcerers' Tower. Due to the quest's requirements, the minimum magic level for any spell is actually 67, so some are unlocked simultaneously upon completion. The levels given are those that are displayed in the Knowledge Base and would be the correct levels if the spellbook had no requirements.

Void runes
Void runes can be crafted from pure essence only on the void altar in the dungeon of the Sorcerers' Tower. A void talisman is the simplest way of accessing the altar. Void talismans can be combined with a plain tiara to make a void tiara. Runecrafting staves, which can be bought for 10,000 runecrafting guild tokens, can also be combined with a void talisman to make a void runecrafting staff. Omni-talismans, omni tiaras and omni-talisman staves can also be used to gain entry. Technically, 51 Runecrafting is required to craft void runes but the Runecrafting requirement to complete the quest is 60.

Void staff
A void staff, very similar in nature to law, nature and astral staves, can be bought from Daemonheim for 15,000 dungeoneering tokens. The staff can store up to 1000 void runes at a time and has a 10% chance to not use a void rune whenever a spell is cast. It requires 30 Attack, 45 Magic and 45 Dungeoneering to wield (although, like astral staff, it has no use until Sorcerers of the East is completed - which has higher magic requirements than the staff itself).

Void spells
The main set of combat spells in this spellbook are based on the new element 'void'. There are 5 spells: a strike, bolt, blast, wave and surge:

Combat spells
Aside form the main void spells, there are seven more unique combat spells in the eastern spellbook - each of which can only be used on a specific type of target:

Teleport spells
There are several teleportation spells in the eastern spellbook, each one leading to a different location somewhere in the Eastern Realms:

Non-Combat spells
The Eastern Spellbook only contains 4 non-combat spells - three enchantments and Spellbook Swap.

Master spells
The final set of spells in the spellbook all require level 99 Magic to cast. Each one can only be casted once every 30 minutes, like home teleport. They are either very powerful combat spells or very useful non-combat spells.