Sealed Japanese booster boxes
2011: Black & White releases in English
Hmm, if you dump things into your graveyard, then simultaneously reanimate an Autocrat and two Purphoros (for style points, use Balthor the Defiled, who only hits red and black creatures), and that's an even 20 damage right there
Aside from the five colors Magic also used to have artifacts in a Brown frame and the current artifact frame is grey, which makes those two colors unlikely
Once you have the poison engine going, Brimaz effectively turns all your Phyrexians into rattlesnakes, since using even just one to chump-block means that you get to proliferate at the next end step
You can check out our full list of Secret Rare cards from Terastal Festival for more details