You people are so naive....sigh 
Here is a post that says it all pretty much:
I think why we didn't see earlier that UB is the best character in the game BY FAR, is because 1. most UB'ers suck, you need very little skill to play well so why bother getting better? 2. He has a real counter in Rook, but again that's his only counter save for another UB.
UB is Overpowered, like it or not. He definitely needs a nerf, since a looooong time ago.
I wish I had the replay to show it to you guys, with the best damn UB i have ever seen in DG. It was me, DiceAreEvil and Playgroundlegend, vs Patz and 2 other pugs. Patz (enemy) was UB. I was erebus, and my allies were Oak and Regulus. The other 2 players were pretty useless, so me and my team were litterally farming them, getting a lot of kills. However, Patz (The UB), was getting kills, by spamming sigils early on, did a lot of farming and outleveled everyone by 3-5 levels.
When he hit level 15 he got Acclimation of course. From that point we just couldnt kill him, so my regulus ally said: I will get Ashkandor. and so he did get it. I was watching as he took a tower in 10 sec with just auto attack, and the nice yellow number 4xtimes critical hit, so he had it for sure.
The UB was pure ooze build, no spit at all. Full stats, full ooze, 1 point in grasp, and inner beast and Acclimation.
By the time he was level 20 we were levels 15-16. So he decides to go take our portal just like that. My team sent away the other 2 guys from the right portal, as the UB was going in the left portal. He captured it and stayed there, destroying towers. I go to fight him with my erebus, he took all my 7k hp and i took his 2k out of 9k (without sigils) max hp. I go to crystal, while I request assistance from my team.
We all go to kill him, he doesnt run. We fight him 3v1 spamming Bite, Penitence, Surge of Faith, Mines and insane AA from Regulus. He almost killed my regulus ally but Oak with his shield saved him. Reg goes to crystal and comes back. The UB was NOT sigiled, he had 3000/9000 hp. He starts to run, but we were already on his tail. I caught up to him, with Bat swarm, Bite immediately. Oak goes behind me and starts Penitence, surge spamming. Reg caught up, and we were all 3 hitting him with low hp. Reg had full Maim, Max range, Max Angel fury, +Penitence+Bite=He was insanely slowed.
We were at the 2 side towers at that point. All hitting him as hard as we could. He hits a sigil, goes to 5k hp. His max HP was 16k, but we had hit him hard.
He managed to go up until his crystal with 300-400 Hp. He COULD NOT kill him. No matter what.
What was happening is that he got Bulwark of the ages, (saving gold probably) along with Acclimation. So even just a hit from my regulus ally (over 500 damage) was enabling his Acclimation, or a bite or Penitence. His Acclimation skill was always on, along with Bulwark of the Ages, along with Groffling Warplate +other armors. He had about 90% damage mitigation.
And the 40% was just from Acclimation. To make a long story short, we lost, as his allies decided to help him in a minute or so, they teamed up, and took out citadel down. Good Game.
I wish you could see the replay, see my team play PERFECT, only to lose to 1 enemy demigod. My team<UB.