Theme Boosters can also contain uncommon showcase cards
Winnable, but it requires understanding attack targeting more precisely than most matchups do
Argivian Find Changeling Wayfinder Civic Wayfinder Dee Kay, Finder of the Lost Deeproot Wayfinder Eccentric Pestfinder Farfinder Find // Finality Find // Finality Find the Path Finders, Keepers Fortuitous Find Fossil Find Glorfindel, Dauntless Rescuer Goblin Trapfinder Golgari Findbroker Griffin Dreamfinder Jungle Wayfinder Kozilek's Pathfinder Life Finds a Way Loot, the Pathfinder Merfolk Wayfinder Nimble Trapfinder Pathfinding Axejaw Satyr Wayfinder Silhana Wayfinder Silverglade Pathfinder Tishana's Wayfinder Trapfinder's Trick Treasured Find Wose Pathfinder You Find Some Prisoners You Find a Cursed Idol You Find the Villains' Lair
If Chulane, Teller of Tales or some other crazy value engine commander is running wild, this might be the perfect way to deal with it and slow your opponent down a bit
The logic behind these decisions is the Game Changer list filled with game warping cards
Against another blue deck, it often costs just 1 mana to counter a key spell, so its perfect in Izzet Murktide or control lists that try to tempo out their opponent