The ban on Faceless Haven slowed mono-white down a little, and these two cards are your most valuable when the game goes past turn four or five
Two mana for an extra turn with no downside is some of the best value you can find, but with a little deck manipulation, you could cast it as an instant to take a turn out of order , too
Embercleave is hard to play around outside of just killing off your creatures
This works well if you happen to mill over The Indomitable with Admiral Brasss enters-the-battlefield effect, or if an opponent has Artifact removal
#10: Mirri, Cat Warrior Mirri's first card is a very weird case
With enough determination, she plans to achieve her dream of becoming the best Boros investigator Ravnica has ever seen