back when i did discard, i used to run that combo, needless to say the combo quickly got banned amongst my friends
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for multiplayer you should try phyrexian swarmlord. a 1/1 infect at each upkeep for each poison counter that all your opponents have.. combined with your ichor rats, thats alot of tokens xD
throw some mimic vats in there!.. they top deck, mimic vat a liliana's specter, play a token copy it directly after their draw step, they discard the card they just drew. completely lock down the opponent like that