Altars are permanent enhancements that persist on your character until removed with a Removal Pill, which returns the altar to your inventory. Once removed, altars can be freely traded or sold. Each altar buff lasts 12 hours with a 2-hour cooldown between activations.

Normal Altars are purchased directly from the Altar Exchange in Dragon Castle. Advanced Grimoires - also sold at the Exchange - are used to upgrade Normal Altars into Advanced Altars. Removal Pills are available there as well.

After obtaining an altar, visit the Altar Priest in Dragon Castle to activate the buff. This NPC handles activation for levels 10 through 100.