Shifting Borders

Instant - Arcane, 3U (4)
Exchange control of two target lands.

Splice onto Arcane {3}{U} (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. Alex Horley-Orlandelli

Gatherer Card Rulings [Nov 2009]

• 6/1/2005: If one of the targeted lands isn't a legal target as Shifting Borders resolves (say, because it has left the battlefield or become untargetable), the exchange doesn't occur.

Format Legality	Legal in Vintage, Legacy, Extended, MTGO Classic Banned in Standard
Printings (1/8)	Saviors of Kamigawa (Uncommon)