Bug or Feature: Overlord Unending Pyromancer Draconic Flames?

[KoshLovesYou]

This might be well known due to Pyro being a core character, but couldn't see a thread about it, but it could be a new weird twist interaction with doom/crits and the Critical Mastery Rune, and the passive custom skill that buffs the Pyromancer's critical chance. It's also probably specific to Overlord mode given that I also had the "Gain 5 points of Concentration by eliminating elites and Lords" skill tree maxed.

Long story short, I hit Overlord 1, and after finally getting the passive skill that gives Pyromancer's crit chance a chonky buff (30 at start I think) I realized that my concentration was not fading...at all. No matter how much damage I took, once I first hit that portal, I had Draconic Flames on for the rest of the match with zero drop. I'd taken no passives for gaining concentration beyond the inherent skills I unlocked. Between messing with the doom staff, using a few off character doom skills that also boosted crits, and the multi cast chain rune? It was just always running.

Which I'm...GUESSING isn't the intention? I figured over time there is expected to be some level of diminishing returns for concentration/kill ratio dynamics; kinda like how there are diminishing returns with the Cursed Captain and their 'refueling' of their ship with gathered souls (is it souls? i assume those are souls), slowly getting less and less time over time per souls shoveled in.

Still beefed it eventually, didn't make me immortal, but sure felt uintentionally overpowered a bit, even for my skill/time investment in the character. Feel free to "It's a feature not a bug" this one though, as its pretty game mode specific and not something I ran into outside of Overlord mode.