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At that time, there weren't enough Learn cards to justify Lessons taking up sideboard slots, either
In addition, there is a story that has additional needs
Tannuk, Steadfast Second Tannuk, Steadfast Second takes a stab at being Sneak Attack in the command zone, and it does pretty well
They particularly pair well with Final Fantasys Yshtola Rhul, who not only has a blink effect but also repeats the end step entirely, giving another instance of Don & Leos own blink
Gaston has shift 4, but the deck doesn't include a low-cost Gaston (the 2-cost Gaston is Ruby) to allow you to cheat him out that quickly like the Queen, but he can be played on top of the 3-cost Gaston Baritone Bully