Well, it might be obvious to say free spells and fast mana, but theres not a huge amount of difference between a cEDH player dropping multiple rocks, and a casual player dropping a Sol Ring and a Jeskas Will with a Deflecting Swat in hand
This set uses all the rarities listed above aside from Hyper Rare, but it adds one more tier at the very top
Barnabas Tharmr (Kraum, Ludevics Opus) One half of the dreaded Blue Farm partner pairing (the other being Tymna the Weaver), Kraum, Ludevic's Opus provides decks that partner with it two valuable resources: access to the color blue, and a draw engine that exploits Commanders multiplayer status
A 3/3 by itself, it rarely ever gets the opportunity to reanimate cards from your graveyard and does so at quite a poor rate
If you hard cast Vibrance using two green and two red mana in the total five-mana casting cost, you can activate both of these abilities, all while not having to sacrifice the 4/4 creature immediately
Quotes from the canon are italicized and are there purely for flavor