Once you exile a card that meets the discover requirement, you can choose to cast it or put it into your hand, but unless you cant put cards into your hand or cant cast the spell for some reason as the ability is resolving, the card wont remain exiled
After sideboard, Thor provides an additional opportunity to cast Price of Freedom, which is a powerful tool against Four-Color Control
We recommend using ENTRY 4, Upper Level
Michael Krumbs GP Charlotte 2005 winning list paints the picture well: Creatures (22) Lands (18) Spells (20) Sideboard Few cards have been involved in as much evil and just plain not playing Magic as Golgari Grave-Troll
Building a Collection Set by Set One of the most satisfying long-term approaches to collecting is working through sets methodically, using booster boxes as the foundation and then filling in gaps with individual single-card purchases
" " [Executive Produced by Shigesato Itoi: The Worlds First Appetite-Boosting Ramen Card Game, Rameka Kawada Co., Ltd.]