The best tutors for any given strategy can vary, and this list, while containing the most universally played and powerful ones blue has to offer, isnt meant to tell you these are the only tutors you should play
Calhoun - Hard-Nosed Leader [Foil] #32 Lorcana Reign of Jafar Keep track of your collection value over time
On top of that, you can use several combos, like MTG 's Nuka-Cola Vending Machine and Krark-Clan Ironworks to generate infinite mana while proccing Ragost, or Magewrithe's Stone to manually untap Ragost before the end of the turn to proc its ability again
Another awesome way to take over the game is Niv-Mizzet, Parun
There wont be any window to cast it from exile if you cant cast it the first time around
It is a Metal card illustrated by Jerky