Hey, Reddit has been making their own list of items that they think would be cool in Rebirth. I wanted to get your opinion on mine :D! The item's name is The Crucible and it just looks like a stone tied to Isaac's ankle (reference to the witch hunts). It's a passive item that makes it so every 3rd room (excluding shops, boss fights, etc.) is a room filled with champion monsters. If you clear this room, you get a permanent but small damage increase and a small permanent movement speed decrease.

that item wouldnt work because the reduction of speed would be far to big of a negative, either way the champion belt does basicly what you were going for.

yes i check the isaac reddit and ive seen the tons of items, most are pretty interesting.. but youd be suprised to know just how many of them are almost identicle to ones in game :)