Titans' Nest (Ikoria: Lair of Behemoths Promos 212p) - Planeswalker Stamped - Rare

At the beginning of your upkeep, surveil 1. (Look at the top card of your library. You may put that card into your graveyard.)
Exile a card from your graveyard: Add . Spend this mana only to cast a spell that's one or more colors without in its mana cost.