Each pack contains a combination of 14 Rares or Mythic Rares, 710 Uncommons and Commons (maximum of 7 may be Uncommon), and 1 Land card
If you somehow lose control of that commander before you finish casting the spell (perhaps because you sacrifice it to activate a mana ability), it won't change the number of modes chosen
For those who started playing the series with FINAL FANTASY I, these may be the first NPCs they ever encountered
When they die, you'll draw a card and get a 4/3 flying demon
It's effect is on-going, and you can build around it with artifact creatures or things you can't target (like Protection from Black) or indestructible stuff that can't be destroyed at all
By stopping spells as theyre being cast, blue can prevent problems before they happen