Letting one Bolas Citadel in play is already a big threat, so having one in the command zone you can cast over and over again should be classed as a war crime
As I already mentioned, there are nine card types that you can put into a deck, meaning that the biggest a Tarmogoyf can get on its own is 9/10
(Obviously it requires snow mana, which is sort of a restriction, but not a major one)
Being able to play with any cards means that the program allows players to delve into the restrictive Legacy format without suffering the thousands of dollars needed to build the decks
The focus on incremental value means that your engine piece uncommons are hugely influential on how exactly you draft this archetype
Dragonlord Dromoka This is a color combination that often doesn't have a great aerial game, and that is precisely why Dragonlord Dromoka is so good here