Why are there both?
What is the difference?
It seems like Lifegiving has better numbers than Lifebound, and they are right next to each other to unlock, and, I believe, in the reverse order, so it's not like the one is a replacement for the other?
I hotkey them side by side and mouse over them back and forth and the only thing that changes in the wall of text is that Lifegiving has better numbers.
So, what is Lifebound?