Description:
The PvP Arena is located in the Altar of Sacrifice. Inside you will find a PvP zone, new monsters and a raid boss:

Helios – Grand Boss.
Appears daily between 17:00 – 21:00.

Royal Archmage, Royal Templar Colonel, Royal Sharpshooter and Mimillion
– additional mobs worth killing.

The Arena is located next to Cursed Village (Teleport option: Battle / PvP Arena).

Weekly Mission - Altar of Sacrifice Exploration
Weekly mission level: 76-80
Objective: Hunt 150 monsters inside the Altar of Sacrifice.
Reward: 100 Festival Adena