A1
Like the one used to ascend Pun-Pun?
Assuming nWoD.
It depends on who and what you're affecting with it.
Life 2 allows you to transfer features to and from simple lifeforms like bugs, plants, fungi and microbes, 3 for non-sentient complex life. Life 4 is required to transfer features to(but not from) sentients, but nothing is mentioned about supernatural traits.
Use the highest applicable, and the effect is Vulgar and not allowed to be indefinite.
Life 3 if you're taking on the changes to yourself.
Life 5 allows you to create an outright freak of nature, but specifically does not allow the traits so created to be transferred with lower dots of Life.
Spirit 4 allows you to make a Fetish(sealing a Spirit inside something to allow the use of it's Numina) or induce Possession, which may not be that bad if you have the Spirit under control with another spell.
Spirit 5 allows you to directly manipulate Spirit Numina(the powers of Spirits), adding and removing them as you see fit, limited to spirits with rank at most equal to the lower of your Spirit or Gnosis.
So assuming you want supernatural power transferred to yourself, you'd need a Spirit 4+Life 4 to seal a Spirit into yourself(turning yourself into a Fetish) or a somewhat questionable Spirit 5 + Life 4 to grant yourself Numina and get smacked by the GM. Increase that to Spirit 5 + Life 5 to get more than a few days duration out of the Fetish trick or Spirit 6 + Life 5 to get the same effect with transferring Numina.
Life 5 might allow you to use Fantasia on yourself, but given that you start taking damage from people looking at you, thats not a good idea.
None of those are allowed to be of Indefinite Duration, mostly due to the 6 dot rating you'd need for that.
EDIT: Except maybe for Summoning/Awakening, Controlling and then Possessing yourself with spirits. Costs quite a few willpower dots to relinquish or run out of spells you can sustain in a jiffy though, since you can't Combine Control and Possession without needing Spirit 5, which reduces the duration to the lesser Prolonged.
