Boss Altars are spread out around the provinces and allow the player to access special arenas where they have the chance to fight and defeat a boss. Players are required to sacrifice a specific type of item to go through, though there are always clues around the altar about what type and quantity of items are needed. Only one sacrifice is needed for groups of any size, as once the sacrifice has been completed, all players close to the altar will be teleported to the arena.
The boss has a good chance to drop a few very powerful items. However, it can only be fought once per payment. When the boss is killed, it won't respawn until the player leaves and pays the fee again. Using /class will not make it spawn again and the boss altar does not re-set until every player has left the boss room.
Here is a list of all currently known Boss Altars, sorted by minimum recommended level (based on the level requirement of the dropped boss altar items, although they can be challenged a few levels earlier successfully in most cases).
|Boss Altar:||Recommended Level||Location:||Item requirements:|
|Bovine Barn||20||Durum Isles||8 Leather|
|Rotten Passage||25||Saint's Row||8 Rotten Flesh|
|Sunrise Canyon||40||Mesa||4 Coyote Fangs|
|Prison of Souls||45||Twain Lake||6 Ghostly Essence|
|Plague Laboratory||55||Olux Swamp||5 Cursed Venom Sacs|
|Tribal Sanctuary||57||Jungle||4 Zombie Eyes|
|Magmastream Core||60||Volcanic Isles||6 Mineral Cinders|
|Challenge of the Blades||70||Kander Forest||5 Werewolf Tails|
|Altar of Sanctification||70||Dernel Jungle||1 Skiens Badge|
|Arena of the Legends||70||Temple of the Legends||5 Broken Amulets|
|Geyser Pit||90||Corkus||8 Robot Antennas|
|Aerie of the Recluse||95||Corkus||7 Turtle Shells|
|The Orange Wybel||99||Sky Islands||8 Wybel Fluff|
|Bottomless Pit||101||Portal to Dern||6 Soul Essence|
- The items dropped are all Level 60, however the altar must be completed for the Level 57 quest The Passage.