Just had a run where I got an uncommon version of MoM and it seemed to tick about every 7.5 seconds? Didn't feel quite intended. 
#Mask of madness - insane tick rate
late dagger
woeful spoke
No, that is actually correct "Degeneration" scales with Regeneration buffs.
late dagger
Ok. I don't think I've ever seen that explained anywhere though. The bottom text of that item (the uncommon one) disappears cause the info square is too small, could that be where it is?
iron swift
No, that is actually correct "Degeneration" scales with Regeneration buffs.
Mara, the text for both Uncommon versions of Mask of Madness appears to have the bottom lines cut off. Here's pictures of Degeneration with Performance Mode On and Off.
And here's pictures of Conversion with Performance Mode On and Off
Took these with my phone as using Win + Shift + S wouldn't cause the info pop up to disappear and using Print Screen key wouldn't capture the pop up info box? Not sure what that was about.
iron swift
Ok. I don't think I've ever seen that explained anywhere though. The bottom text...
The bottom line on Degeneration reads
Frequency scales with Regeneration
But yeah, it is cut off in game.