I've been buying a pack or two every now and then. I cleaned the Reston Target out of them this afternoon by buying one. I need lots of Kami. Because Devouring Rage is a really cool card.
As an additional cost to play Devouring Rage, you may sacrifice any number of Spirits.
Target creature gets +3/+0 until end of turn. For each Spirit sacrificed this way, that creature gets an additional +3/+0 until end of turn.
That for 4R. It's an arcane instant (which means you can slip in other effects too if you have the manna and the right cards).
What's cool about that is the Soulshift ability. I got a Vine Kami which has soulshift 6. I reckon I start put a bunch of Kami out there, sacrifice the cheap ones first, then play the ones with big soulshift numbers later, meaning I get all my spirits back. Since I also have Through the Breach, (put a creature from hand into play with Splice onto Arcane 2RR), for 9 manna I can do a hefty amount of damage, all of it instant so it can be done after blockers are declared and before damage is assigned. put on a lowly 1/1 and sacrificing all the big creatures just to get him through, or else putting it on something with trample, and boom, I win. Â It's even better when I instants to recover the spells or duplicate their effect.
Sorry, I sound like a nerd and a tournament goer, it's just never been so obvious to me how a card can be abused if you just have the manna.
Edit: just thinking about that, I realize that I couldn't use the splice to arcane, because it would use a different target, so the converted manna cost of the whole process would be 10 manna, instead of 9. More, obviously, if I was digging in the graveyard and used more than one Through the Breach -- though the future Through the Breaches might possibly be able to use the splice.