Cosmos-Shaper Kassemina

Eminence — You may play cards from your hand
face down as colorless lands with "{t}: Add {c}."
You may tap three face-down lands rather than
pay Cosmos-Shaper Kassemina's mana cost.
Whenever you tap a face-down land for mana,
you may reveal it and add one mana of any color
of that card's color instead.