Number 240 Language English Legal Formats Commander, Legacy, Modern, Vintage Not Legal Formats Alchemy, Brawl, Competitive Brawl, Historic, Pauper, Pioneer, Standard, Timeless Rulings (6/18/2021) The Underworld Cookbook's last ability can target any creature card in your graveyard, not just one discarded with its first ability
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Shaving off one mana from Card not found seems to do a lot
Since you're mono-blue, I'm thinking a blink strategy is a no-brainer, ensuring you can wipe out multiple permanents every turn
In Commander, with the 40 life start, and the repeating tutors, its just downright nasty