You can just use Cockatrice for that. Sure it’s not as pretty or as easy, but it supports every card since you pretty much are playing paper magic and it’s not trying to be the referee.
I think a lot of people explicitly do not want to bother with playing essentially paper magic, because it requires quite a bit more concentration if your board state is complicated to not miss any triggers or phase change too far accidentally.
There was an app called Apprentice that was popular around 1996, and that is how we would lay MT:G via IRC. It was a generic tabletop simulator and you create or import he cards.