Biome Shift
Whenever a land enters the battlefield under your control, you may have it become a Biome in addition to its other types. Whenever a Biome enters under your control, add one mana of any color. Spend this mana only to cast Boss spells.
Whenever a land enters the battlefield under your control, you may have it become a Biome in addition to its other types. Whenever a Biome enters under your control, add one mana of any color. Spend this mana only to cast Boss spells.
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