Gift: Weak. Bonds cost as much but you get HP when creatures just sit there, what can last... indefinitely. Deaths are one-off. So, maybe 5 HP?
Bribe: Very cheap. Upgraded Sundials can do this for free, but still... well, seeing as you don't draw a card with this one, guess it's a fair deal.
Wretched Shadow: I pay 3 :death2
1 turn just for a creature that is half stats of some other? Well... guess this could be useful, sometimes... but still, PU is much better. And with this one you can change your mind in case anything better comes up. So, fine I guess.