Alright then, here's the second part of the guide (the inside of the EU)!
Now that you have your toxin, you have to talk to the NPC "Momentor" (which is next to the NPC that gave you the toxin) to enter the EU
Now, to start the quest inside, you will need at LEAST 8 people in the squad, 10 people is optional. Once you have enough people to start it, the leader of the squad will have to talk to the "Wade Slanh" npc and start the EU quest. He will see the following quests:
After you took this one, another one will appear but the previous option will still be there. Don't let that confuse you, just take the other option now.
Now that you did that, all the squad members will be able to take a quest for the gem that they are doing. Now, time to explain what the gems are doing there. Well, each gem (besides Eternity and Creation which i will explain later) represents a route with mobs that you have to pass from point A to point B, each route has 2 rows of "red balls" that have various debuffs (slow, which reduces your move speed to 0.1m/s, stun, purge, seal and freeze) and also each route has unique mobs which are optional to kill. Every gem (besides those 2 I mentioned earlier) have quest that gives you a certain amount of mobs that you have to kill and the reward of each of those quests is a DOUBLE SKILL DAMAGE buff, which is great for casters. The easiest gem to get the double damage on are Eternity and Creation, where you can basically do nothing and get the 2x skill damage bonus (but it requires 10 people since the other 8 gems must have a person on each). The second easiest gem is Theta where you have to kill 3 medium hp mobs, after that goes Epsilon where you have to kill 8 mobs with a delayed damage skill ( I think that it's a 8 sec delay earth damage skill) which can easily 1 shot a HA/LA class so it's preferable for a person with purify to do this one. The others are a bit harder, but in my opinion alpha is the 4th easiest one. The gems are the following: Alpha, Beta, Gamma, Delta, Epsilon, Zeta (magic damage immune mobs), Eta (physical damage immune mobs) and Theta.
Now you can take the quest from "Wade Slanh" with the name of your gem and dig the gem.
After you have dug it, you will be teleported next to a "Mirror of Eternity" at which you will have to wait until a quest appears. Now before I explain any further i want to add that you NO MATTER WHAT are not allowed to pass the 2nd row of the purple beams, if you do so the quest will fail and you'll have to redo all the things that I've talked about earlier.
Once you take the quest, follow the arrows and run to the other "Mirror of Eternity" and turn the quest in there. Once you do so, I will repeat it again, DO NOT CROSS THE SECOND ROW OF PURPLE BEAMS. While you wait for the rest to finish you can focus on killing the mobs to get your 2x skill damage buff.
Once the last person (Theta gem) has finished, everyone needs to get back to the start (fast way to get there is just to jump over the edge, in the hole).
Once all members are in range the leader has to talk to the NPC "Zirih Slanh" and turn in the quest called "Gem Delivery Success".
Now goes the boss killing part. Once you turned the previous quest in and you crossed the bridge you will end up seeing "Gorath, The Worldrenderer" who has pretty low damage but an very annoying knock back (which you can easily dodge by turning your back to one of the stones around him).
After you killed him, you will face the second boss called "Mistress of Endless Night" on a small island that is across this one, you can reach it by crossing 2 bridges (WARNING: THE CONSTRUCTION OF THE BRIDGES IS PRETTY BAD, SO YOU MIGHT FALL THROUGH THEM AND RAGE). This boss is easy, but kinda like the 1st one annoying. It will always spawn with 1 real and 2 fake bosses, the real boss always has the bless buff (like a barbarian's invoke or a cleric's bb) and you should always kill the other 2 illusion first which will make the buff poof. Keep repeating the process of killing the illusion and the "real boss" until it stops spawning.
After you killed this boss too, you will have to face the 3rd and last boss whose name and screenshot I have forgot and which I will add tomorrow. This boss has 2 modes: "Flying mode", where he runs around like a chicken until you get its hp down to 6 million from 8 million after which he will go into his "Landing mode" where he you can finally kill him. For killing him in the first mode it is very nice to have the double damage buff on one or many of the casters who hit him, BMs can also hf this boss when he gets to the ground which can make the killing possible in like 10 seconds.
The "Flying mode":
Now that he's dead everyone must go back to the start to get the reward. The squad leader must take the option "An Unexpected Gift" which will make all the Tuc Su Toxins from the players disappear. After he's done so, everyone can talk to "Zirhik Slanh" and get their "Endless Universe Chest" which can contain rare skill books, Chrono pages, Apocalypse pages or Detection potions.
Hope that you understand it now, and as always, if you have anything to add/fix feel free to pm me here or in-game or write down in the comments, thanks!
PS. Don't let the "long" guide fool you, one run can be done in 10-15 minutes.
