Ive seen people try to make Risk Factor work in EDH a few times before, and in reality it almost never draws you any cards because 4 life can be too insignificant
The Master, Multiplied has an entirely new effect that should make it a popular commander from this series
I respect that design, especially in a Commander world where figuring out what green cards to cut is much harder than figuring out what to include
These ready-to-play decks let you focus on learning the rules without worrying that your deck is potentially unbalanced or having to invest in lots of booster packs
Your deck needs to use counters for this excellent proliferate card to work, but the free proliferate triggers do so much work in decks that care about it
AND SOME KAVU, OF COURSE Kavu is a really cool creature type, one that we havent seen play a significant role in a set for a very long time