Revenge of the Round Arena!

[Ultimatecalibur]

I think there's a reason everything's flat now; in T5 you could trivialize certain mechanics because there were slopes.

I think they actually had to even out the terrain in T5 because it was killing players who were doing the mechanics right. Moving up or down a slope makes escaping a pillar AoE take longer and uneven terrain can cause sphere aoe's to require more distance to escape than their radius if they end up in a bad spot.