Paying three black to draw 7 and then an additional black to get those 7 cards will cost a lot of life, but it seems like in most scenarios you will get pretty insurmountable card advantage out of that, and 7 life will be worth it
These four are very powerful, but their value is totally related to how fast you can get experience counters
Instead of leaving a creature behind, Briefing digs for the card to be "flashed back." Briefing also doesn't target, so Surgical Extraction isn't a clean answer and Scavenging Ooze is less effective
Obviously, that means the MTG Power 9 is out right away, which is good
Tithe (T1, Ext, S, Block) A mini-Land Tax with one advantage: it can grab the original dual lands
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