Mythical Museum 2 While 'Mythical Museum 2' only requires two cards, they're both rainbow Two Gold Star rarity cards so may have to open an awful lot of Mythical Island booster packs to find them both
(4/17/2020) If you cast a spell "without paying its mana cost," you can't choose to cast it for any alternative costs
That means if you have a Nethroi, Apex of Death somewhere in the pile but not on top, you can cast another one as its own creature without conflict
That may sound slow, but assuming youve also got a few one mana creatures like Ruin Crab, which mills whenever you play a land, and maybe a couple of copies of Tashas Hideous Laughter, then you can easily take someone out by turn six or so with this strategy
Phyrexia: All Will Be One brings a lot of interesting tools and toys to the table and it's going to be very fun to see where Pauper goes from here