Lightning Gem

{t}: Add {w} or {r}.
{w}{r}, {t}: Until end of turn, whenever target
creature you control deals combat damage to a
player, Lightning gem deals 3 damage to any
target and you gain 3 life.
A gem of infused titanite. Found in the aftermath of
dragon hunts. Used in infusion to create lightning
weapons. Lightning weapons inflict lightning damage,
and scale with faith.