Corrupted Crossroads

Oracle Text

T: Add C to your mana pool. (C represents colorless mana.)

T, Pay 1 life: Add one mana of any color to your mana pool. Spend this mana only to cast a spell with devoid.

Card Rulings

1/22/2016 The mana produced by the last ability can’t be spent on a colorless spell unless that spell specifically has the devoid ability.