Hi everyone,
How about add a new level theme modifier : Purple chaos (ref. to void color)

A purple background (under the lvl's icon) mean you can encounter randomly themed enemies.

Example : A mechanic level with this modifier can contain all mechanic variant enemies (poison, fire, shock, freeze and curse)
And this level can also have multiple status trap on same time. (spike, fire trap, poison trap ...)

This mechanic add more difficulty to the T3 endgame. So it can only appears under deep 18.

Thanks for reading, please tell me your feel about this idea.