So while it's technically possible to beat the game (that is, complete every collection) without paying a penny, it's practically impossible
I finished my collection of the Japanese art planeswalkers from War of the Spark in foil (with the obvious exception of the $2 to $3k foil Liliana), and Im nearly finished with this collection
As a note, while Khans of Tarkir is coming to Arena, this set isnt Standard legal
If you don't control an Army, create a 0/0 black Zombie Army creature token first.) Instant Color tag templates(None) Deadly Derision Destroy target creature or planeswalker
There are lots of ways to make a good MDFC, like its power, flavor, or design
Deadlock Trap by Jason Rainville Deadlock Trap | Illustration by Jason Rainville Deadlock Trap is another great example of things that arent obvious at first sight