From Battle of the Immortals Wiki
- Players LV115+ can find Iamus in Atlantis to enter the Endless Stairs. Players can only enter alone, but guidance will be offered by Iamus once inside. Rewards include EXP, Exaltation and Emblems.
Endless Stairs is a series of "Mini Instances" where the player has to fight their way to the top. Each "floor" has a number of enemies that can do various things. Once the player has cleared a floor, they can choose to heal (Costs get progressively higher every 10 floors), quit or continue. Every 10th floor is a Boss floor. Once the boss is defeated, he drops a chest (similar to an NPC, so you have to click it to open it) that contains an Emblem. The higher you progress, the higher quality the Emblem.