Through the Breach

Instant - Arcane, 4R (5)
You may put a creature card from your hand onto the battlefield. That creature has haste. Sacrifice that creature at the beginning of the next end step.
Splice onto Arcane {2}{R}{R} (As you cast an Arcane spell, you may reveal this card from your hand and pay its splice cost. If you do, add this card's effects to that spell.)¹
Illus. Hugh Jamieson

Gatherer Card Rulings [Nov 2009]

• 5/1/2007: Putting the card onto the battlefield is optional.  When the ability resolves, you can choose not to.

Format Legality	Legal in Vintage, Legacy, Extended Banned in Standard
Printings (1/8)	Champions of Kamigawa (Rare)