Some later Flairs have to be made available by unlocking earlier ones
Ink is the magical element that powers the realm of Lorcana
And a few of the removal spells are meant to take out small or non-flying creatures, like Sweltering SunsSweltering Suns, MagmaquakeMagmaquake, and Clan DefianceClan Defiance
Thassas Oracle + Laboratory Maniac Laboratory Maniac and its evil twin Thassa's Oracle are the two most popular ways to win Commander games in blue
All of them have incredible 187 (enters the battlefield) abilities that you might want to get a second use out of
Theyre action at a cost, and you start getting into logjams where you cast your learn card, then cast the Lesson, then draw more learn cards in the process, and have more spells than you have mana to cast them