Basically Blood Harvest is a deck which makes use of vampires and Bless. then you can parallel universe your strongest vampire.
E.G. Minor Vampire + 6 bless = 2/2+18/18. that means you end up with a 20/20 minor vampire, which will leech 20 hp a turn for you.
Then you parallel universe it.. and you could potentially get a 120 hp leech, restoring you to full hp every turn.
The deck im using for this at the moment is:
This deck is not completely balanced, and definitely needs tweaking quite a lot. but as long as you understand the concept you should do fine.
Once you got the 20/20 vampire duplicated into 7* ^ add fractals to speed-kill.
- Via parallel/twin universe
^Err, 20/20 Minor Vamp. x7 = 140/140. (You get full hp every turn.)
Aww.. just pure iron pyrite.