I know mvps are FFA, but I believe there are some rules involving Ice wall, like not IWing people IN with monsters, or trapping them beneath tons of IWs.
My question is, if someone shows up (Oh say a 99 IC high wiz) and starts using my IW instead of casting their own, can I fireball or sighttrash to destroy my IW so they cannot use them any further? I've run into this twice now in a week of doing mvp's on my wiz, and I just want to know if this a course I can take if they keep it up.