Found A6YTQ383, on Gold Stake Green Deck (Should work on most decks, and has been tried on White Stake) on Ante 2 big blind shop there's a Spectral Pack with a Wraith in it, taking it gives you a Blueprint.
On the first shop of Ante 4 there's a Baron.
(If you manage to reroll 11-13 times in Ante 5 there's invisible Joker, but idk if that's easily possible as I'm only seeing it in Blueprint the Seed Analyzer)
In Ante 6, about 6 rerolls in is a Mime
#Basic Blueprint, Baron, Mime
pine orbit
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Basic Blueprint, Baron, Mime