The game is F2P although one might argue that you do need to grind a lot to get more cards
Although not the site's primary functionality, you can search for specific cards and it will yield you similar cards in nature and functionality, and excluding any other factors, which has its own pitfalls - for example, it wouldn't give you just any other green card, but it might give you a non-green alternative with the same function
you cannot cast it without sacrificing a creature, and you cannot sacrifice additional creatures
Well that's ultimately subjective, which is what made Shivam's post and the comments within so interesting to me
Thats great news for the European market, even if it doesnt help those of us over in the US
But even one set of genuine typal support cards for these decks can form the crux which justifies all your other card choices particularly if one of them is a strong typal-enabling commander