Example: If you have 55% win rate while picking 3.5 Rares per pack, and 60% win rate by picking 2 Rares per pack (ie, only ones for your deck), then the number of drafts you need to do to complete the set moves from 47 to 68
If a double-faced card is exiled this way, it will return to the battlefield with its front face up, regardless of which face was up when it was exiled
Concealed Courtyard might pair awkwardly with Shambling Vent, making it difficult for your fourth land to enter the battlefield untapped, which is a big deal when Gideon, Ally of Zendikar is one of the decks major payoffs
If you dont want to sacrifice your own land, I cannot recommend the card Cleansing Wildfire enough
It can also make treasures, both as a one-off, or repeatedly/en-masse
WHIRLWIND DENIAL Small brain: Neat, a Flusterstorm alternative to help against Storm-like combos in Pioneer! Medium brain: Hey, this is the best Limited counterspell weve had in a while