Agyrem Plane Ravnica Whenever a white creature dies, return it to the battlefield under its owners control at the beginning of the next end step
As always, the wonderful Frank Karsten has written an excellent piece examining the potential of very land-light Limited decks in great detail
Retreat enchants one of your lands and passively adds additional mana and card draw, usually once per turn
That foil slot could be a Common all the way up to an Enchanted
Super-Skrull The rates Super-Skrull charges for its results are on the high side, but they are worth full cards on their own and you always want access to them
Traditionally, theres two rares for every mythic, so the breakdown looks like this: For those of you craving a Mana Drain, youll hit one every 75 packs