This isn't a plugin request necessarily but it is something that in my opinion would make colosseum pvp better. I think that a saturation effect should be added to players when players spawn in to fight because they won't be able to last that long without it. Once players run out of hunger, which is pretty quickly in 1.12, they're just kind of walking around slowly, which isn't that fun for pvp. I think that just adding saturation for the 10 minutes allotted for pvp would make it easier for the players to fight. Another thing that I think should be added is unbreakable weapons, I think that adding this feature would again, make it easier for players to focus on fighting. In my experience with colosseum I've found that it's almost impossible to kill a player 3 times without your sword breaking somewhere in the middle, then when it does you're just punching them to death. I think adding unbreaking to the weapons will make games easier, faster and less boring. Although I don't think armor should have unbreaking, I think the armor should stay breakable just because if a player does manage to survive that long they should be put at a disadvantage. With a weapon breaking it's just annoying, you just start punching someone and it goes on forever.