Even if you never see any Initiative creatures when drafting, you should probably still try to have a plan against them, if you know they are in the cube
If The Ur-Dragon itself hits the battlefield, the game is likely over
For more, check out Planeswalkers Guide to Streets of New Capenna
Once you've decided upon the Flair you wish to add, select 'Exchange' before confirming you're happy for these duplicate cards to be consumed
The pre-built decks included in the Classic set are themed around the three starters from the first generation of Pokmon: Bulbasaur, Charmander and Squirtle
That means that any spell with weird, alternate ways to cast it, like adventures, foretell, cards stolen with your creatures or spells, etc., all go to exile