Caves of Koilos

Caves of Koilos is a foundational land card in the Magic: The Gathering multiverse, representing a cavernous, desolate location on the plane of Dominaria. First introduced in the 1995 set Ice Age, the card has been reprinted numerous times, including this specific appearance in the Magic 2015 core set. Mechanically, it functions as a 'pain land,' allowing players to tap it for colorless mana or pay one life to add white or black mana, reflecting the harsh trade-offs of the location's dark, subterranean lore.

The Magic 2015 iteration features atmospheric artwork by artist Yeong-Hao Han, who sought to capture the oppressive, rocky texture of the subterranean caves. During this era, Wizards of the Coast focused on streamlining core set designs to be accessible to newer players while maintaining the strategic depth requested by veterans. The inclusion of Caves of Koilos provided a essential utility land that helped define the mana bases for multicolored decks in the Standard environment of the time.