Titans' Nest

Enchantment — {1}{B}{G}{U}

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 {C}. Spend this mana only to cast a spell that's one or more colors without {X} in its mana cost.

Rarity: rare

EDHREC rank: 9929