Shimmer

Enchantment, 2UU (4)
As Shimmer enters the battlefield, choose a land type.

Each land of the chosen type has phasing. (It phases in or out before its controller untaps during each of his or her untap steps. While it's phased out, it's treated as though it doesn't exist.)¹
To buy unseen land, pay in unseen coin. -Suq'Ata maxim
Illus. David A. Cherry

Gatherer Card Rulings [Nov 2009]

• 10/4/2004: Can affect basic or non-basic types, but it must be for a specific type. The chosen type must be an existing land type. See the glossary of the comprehensive rulebook for more details on existing land types.

Format Legality	Legal in Vintage, Legacy, MTGO Classic Banned in Extended, Standard
Printings (1/6)	Mirage (Rare)