Tyvan, Bearer of Gifts

Instant and sorcery cards in your hand have
Splice onto instant or sorcery an opponent
controls. The Splice cost is equal to its mana cost.
(As an opponent casts an instant or sorcery spell, you
may reveal this card from your hand and pay its splice
cost. If you do, add this cards effects to that spell.)
Whenever an opponent casts an instant or
sorcery spell that player loses 2 life, then you and
that player each draw a card.