Shelkin Brownie is one step worse than Cephalid Snitch in that there are no creatures in the entirety of the history of Magic: The Gathering that were printed with the bands with others ability
These Prism Star cards are so powerful that you can have only one of each in your deck - and to ensure that you can only use them once, they go to the Lost Zone rather than the discard pile, never to return
Purphoros might be more Bracket 3 speed, so opting for an Impact Tremors instead might slow your roll a little
Mairsil, the Pretender Huh, interesting how many of these Commanders are Grixis (thats red, black, blue for the uninitiated.) Enter the battlefield effects, or ETBs can be tricky to repeat, but theres plenty of bounce and blink in blue
Aftermath suffers from some staggering inconsistency