Flubs is a homage to the Rider-Waite Tarot card The Fool, the first card in the Major Arcana
Youd have to be crazy to print that with no downsides, but red has you covered with the trifecta of Final Fortune, Last Chance, and Warrior's Oath, which are functionally the same card (though Last Chance has the superior art with that borderless reprint in Dominaria Remastered )
Another Aetherdrift addition that pairs perfectly with The Underworld Cookbook is Marauding Mako
They are not worth buying if you are expecting a quick flip, treating them as a guaranteed investment, or spending money you cannot afford to hold long term
First strike 3/3 Illustrated by Ben Wootten Standard Not Legal Alchemy Not Legal Pioneer Not Legal Historic Not Legal Modern Not Legal Brawl Not Legal Legacy Legal Comp
Softer sleeves with a thickness between 40 and 90 microns will be OK to protect your cards in storage or for a short events (for example during a Draft tournament) or if you are looking to double sleeve your deck although they may break easily if you are playing intensively