Talk:Life steal/@comment-4324788-20130419202203/@comment-7778587-20130427134053

Short answer:

Lifesteal only applies to autoattacks, so pantheon's abilities will not heal you.

However, spell vamp applies to abilities, but not your autoattacks, so if you build an item like Will of the Ancients your abilities will heal you.

http://leagueoflegends.wikia.com/wiki/Spell_vamp