Horizon Spellbomb — ruling 1

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 {G} and draw a card, then you search; you do not search first.

Horizon Spellbomb : règles, fonctionnement et interactions (MTG)

Horizon Spellbomb is one of those cards players keep asking about. Here is, in plain words, what its official text says, the rulings published by Wizards of the Coast, and the combos players actually run.

Official card text

, , Sacrifice this artifact: Search your library for a basic land card, reveal it, put it into your hand, then shuffle. When this artifact is put into a graveyard from the battlefield, you may pay . If you do, draw a card.

How it works : Horizon Spellbomb

Original English text — Wizards of the Coast / Scryfall

#1April 15, 2013· Wizards of the Coast
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.
No other card is named in this ruling.