u/Cynicast9

I'm looking for advice on trying to run an arena combat where the combat space effectively shrinks. I think the easy way to do this is just have portions of it fall as the combat goes on, changing how and where the characters can move, but an aspect of this encounter is it being a competition.

With that in mind, I'm thinking about running it in a way where the characters need to complete tasks before the opposition or sections of their side of the arena will shrink down/change in some way. But I'm struggling to think of a way that I can make it work within initiative.

Any ideas?