Lifegaining Combos

One quite old and among my favourite is Angelic Chorus + Phyrexian Processor. In a life gaining deck it can do wonders, paying whatever you want in life only to get it back at each activation of the artifact.

Yes, Urza was a broken set. So what?

Another combo that most people despise, not sure why since I love it resolves around 2 other white enchantments:

Serra's Blessing + Noble Purpose = Creatures can deal combat damage both when attacking and when defending, meaning double the regular amount of life gain

Please notice that in a & deck the same can be achieved if you're combining Noble Purpose with Seedborn Muse.