CGC TCG Tri-annual Tournament: Your thoughts?

What if, just for gits and shiggles, we had themed tournaments?
I mean, not all of them could be straight up just regular dueling, we could have ones where all players duel while skydiving people have to play with a Shapesnatch deck, or something equally as absurd.
....
Mostly for the experimental aspect, of course.

So, for MTG and Yugioh I assume we're using Cockatrice and Dueling Network respectively. Which system would we use for CFV?