Foil

Instant, 2UU (4)
You may discard an Island card and another card rather than pay Foil's mana cost.
Counter target spell.¹
Illus. Bradley Williams

Crystal Keep Rulings Summaries

• You may discard a non-basic land that "counts as" or "is" an Island, but not one that produces blue mana but doesn't actually say it is an Island. [DeLaney 2000/05/29]

Format Legality	Legal in Vintage, Legacy Banned in Extended, Standard
Printings (1/6)	Prophecy (Uncommon)