hmm how about one that I've been wanting to try out

Arena:Tech-Plateau

this arena can change to any type of field (not including ones with special effects) the field is chosen by the person who last had their pokemon faint or every 3 rounds by the ref, if a electric type move is used there is a 10% chance it will revert to its normal state for 1 round (indigo plateau)
this field cannot stop weather changes, heal pokemon, damage pokemon, or anything to that effect
this field can impermanently change weather, prevent double team, and boost/inhibit moves

Restrictions:multiple-Pokemon no banned moves