This card is pretty good I guess . I mean it's only... okay I'm not going to do the whole "this things isn't that good and I'm going to use stupid people's arguments to prove it" shtick again. This card is amazing and no one will be able to tell me otherwise. The lifegain is negligible but the exile is not. You will always gain the upper hand from using this, trust me. If you have the space and can run 4 copies of this, run 4 copies of this. Seriously. Fo' realz.
Pros: Exile for 1
Cons: Lifegain for the creature's controller