Hmm. Tricky. Since I didn't want another conversation about "one activation has sacrifice and the other activation is just mana", I made returning the creature from your graveyard to your hand part of the cost for making a player lose one life. Oddly, it would be interesting to see if the card could end up standard playable based on it's ability to pile on random life loss when combined with a card that discards cards as part of a cost. Hmm... maybe that's too good. Now that I think about it, even without the life loss, this card turbo-charges the usual discard outlet culprits. All Spellshapers from Time Spiral would just be the place to start.

Okay, I'm changing this. The second ability was ": Return ~ from your graveyard to your hand: Target player loses 1 life." Now it isn't.

That's good. Gave me an excuse to make this cost instead of while I was at it. I also originally had this card sacrificing to gain land, which I decided I couldn't do if it used mana to keep returning itself from the graveyard to play using the mana I was fetching. Since I'm trading creatures for lands now, I can put it back if I feel I need more land searching.