, , Sacrifice Horizon Spellbomb: Search your library for a basic land card, reveal it, and put it into your hand. Then shuffle your library.
When Horizon Spellbomb is put into a graveyard from the battlefield, you may pay. If you do, draw a card.
4/15/2013 When you sacrifice Horizon Spellbomb, it’s search ability goes on the stack, and then the triggered draw ability goes on the stack on top of it. This means you first choose whether to pay and draw a card, then you search; you do not search first.