I don't want to derail, but, I am dying to have people to play with for magic the gathering, and I just use "Cockatrice" from woogerworks.
It can support 1v1...1v1v1....1v1v1v1 or 2v2 or w/e you want, but there's just no in-game rule enforcement, so it's a bit like tabletop sim in that regard...