Lightning Hex

Lightning Hex deals 3 damage to any target.
If excess damage was dealt to a permanent this way, you gain that much life.
(as a hex resolves, an opponent of your choice shuffles it into their library face up instead of
you putting it into your graveyard. If this card would leave a library other than its owner's, its owner exiles it instead and may cast it for as
long as it remains exiled.)