Once it resolves, it will remain in effect until the game ends, Ride the Shoopuf's leaves the battlefield, or some subsequent effect changes its characteristics, whichever comes first
So many sweet things to talk about and hopefully make some great decisions that pay off nicely
For each creature card exiled this way, create a 1/1 colorless Spirit creature token
Getting to dig for an artifact or enchantment and bringing it in with a shield counter is nice, and similarly, putting perma-buffs on your creatures or Commander is good too
My advice when building these decks
In addition, The Book of Exalted Deeds and Platinum Angel both slow the game down by preventing you from losing the game and your opponents from winning the game.