Quote Originally Posted by tgva8889 View Post
Lich's Mastery and Well of Lost Dreams also give you cards when you gain life, so that might be a good choice.
Make sure you you play Mastery after swapping down in life, otherwise you’ll have to exile cards a bunch of cards (unless you respond to life loss trigger by swapping your life total back up)

Sunbond is probably worth mentioning along with Cradle of Vitality, as it does a very similar thing.

Also on cards that probably shouldn’t be played, Transcendence is amusing if you have some way to not lose the game..