With a Temur SabertoothTemur Sabertooth out, and six or more mana, two of which are red and green, you can infinitely play and bounce Zacama, each time generating an additional mana, then its up to you what to do with that infinite mana
Theres no real reason not to go with this one out of the two, with a hefty number of interesting reprints and a fun theme with some interesting gameplay potential
Simply put, there was so much already going on in the three sets that were to make up the Ravnica block -- Ravnica: City of Guilds , Guildpact , and Dissension - that there was no room for it
It is weighted heavily towards two and three-cost so that you can play multiple cards each turn and have more opportunities to build your board while bouncing other cards back to your hand
Its just a really fun set with some quirky cards and interesting set mechanics for casual Commander play