Orshabaal Raid

                       00:00:00: Orshabaal's minions are working on his return to the World. LEAVE Edron at once, mortals.

                       00:03:20: Orshabaal is about to make his way into the mortal realm. Run for your lives!

                       00:06:40: Orshabaal has been summoned from hell to plague the lands of mortals again.

Announcements and Raid Waves:

To all players online at the moment, 3 messages are broadcasted in white text.
With first and second message nothing will appear. Hell starts in the same second as third message appears.
Be prepare to fight with: Orshabaal and Demons

Legend:

Whenever you think the world is safe and all the monsters have been killed, when you least expect it, Orshabaal surfaces. It is a Demon Lord who normally hides very deep down in the depths of The Edron Hero Cave. Its magical and physical powers are overwhelming! Many brave heroes have fallen by the great fireball and energy beam it utilizes. To make matters worse, it flees when it reaches red health, and if the adventurers are not fast enough in killing it, Orshabaals vile healing magic will allow it to return to the fray. Whenever it chooses to raid a world it won't come alone, it brings a lot of Demons as company to help spread death and disaster. Sometimes Orshabaal gets trapped by his own summoned Demons because he doesn't kill his own summons.
If your team was lucky and you survived, you may have chances to get some valuable rares dropped by Orshabaal:

Strategy:

Lure it to the famous spot near the entrance to Cyclopolis. When it's at red health, shoot Magic Walls so it can't run away. The blocker should party mode with the shooters and get the loot ASAP after killing it. Since it's likely the blocker won't be able to heal quickly enough when Orshabaal performs a strong combo, it is advised to have at least a few mages using UH Runes on the blocker. A good strategy is luring the Orshabaal into a place that you can hold just it between 2 trees, or in a corridor where 1-2 Demons limit its movement, helping avoid the line-of-sight attacks. Also its possible to use a medium level char (or a low level) as bait to lure him in a place where he will get trapped by his summons, after that people can easily shoot and Orshabaal won't move until its near death.
Keep in mind that when the blocker is blocking Orshabaal, it will still tend to use Great Fireball and Great Energy Beam, so you may want to stand diagonal and quite a way back from it to avoid these attacks or you may experience a quick death.