MTG Card Back Mystery The cards feature Blastoise on the front with a Magic: The Gathering back on the reverse
Bartz Klauser (Winota, Joiner of Forces) Magic has a very small number of commanders I dont think you can build fairly without resorting to playing Draft chaff, and Winota, Joiner of Forces is near the top of the list
It has been a few years since the Eldrazi appeared in a set, making it all the stranger that a new one would be released in a set like Commander Masters, which is made up of mostly reprinted cards
Finneas, Ace Archer & Burrowguard Mentor If Selesyna rabbits is playable in Standard, Finneas, Ace Archer will be there, as will Burrowguard Mentor, otherwise known as Regal Bunnicorn-lite
As life gainers there is little to chose between Sphinx and Griselbrand and it entirely comes down to which of their other effects and attributes are more suited to your build
In constructed formats, you can just re-cast another copy to get rid of it if it gets too many counters, and in Commander, your life total starts so high that it hardly ever matters