Quote Originally Posted by Dj_Seaghost View Post
Wouldn't that just make it a stronger Syphon Strike?
Not exactly, because BS has an interaction with TBN breaking your TBN to hit BS would offset the cost a future TBN. Since you don't spend blood for siphon strike TBN usuage has little interaction with fueling more siphon strikes.

In essence allowing BS to return a chunk of mana we are making it more profitable to use TBN out of grit.