One studio, plenty of activities
Ive been enjoying this format quite a bit, and while you can occasionally get run over by aggro, drafting squirrels is a great way to avoid that for the most part
Versus, the PVP mode in PTCGO , is broken up into 4 separate ladders: Standard (2~ year rotation), Expanded (4~ year rotation) Legacy (8-10 years old) and Theme
Polygons got you covered.
That means that Grim Reapers Sprint is most likely going to be the cheapest extra combat spell around at just two mana
Black Market, however, will not work as well in higher-powered Commander pods simply because of how slow it takes for you to even begin to enjoy its effects (you will need Toxrill out or get some creatures dead, as well as Black Market out for one whole turn cycle), so do take note of Black Market's potential (lack of) efficacy