You can go infinite with creatures like omer, Marshal of Rohan or just use the extra tokens you generate to pummel your opponents
And I would be remiss for not including them here as I feel like the green version could make the list if I didnt want to put similar cards on twice
Umbris cares about your opponents' cards in exile, so you dont have to worry about most graveyard hate ruining your plan
If you put it in your deck, it's worth getting
If you buy an entire booster box from an eligible game store, you can also pick up a Dash Parr, Lava Runner foil promo
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