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.
Mana cost
1
B
G
U
Mana value
4
Printings
From
$0.33
EDHREC rank
#9877
Buy
Formats
Pioneer
Legal
Modern
Legal
Legacy
Legal
Vintage
Legal
Commander
Legal
Rulings
17 Apr 2020
If you don’t put the card you look at into your graveyard, it remains on top of your library. You’ll draw it during your draw step unless something else moves it.
17 Apr 2020
Mana produced by Titans’ Nest can be used to cast a spell that has {X} in an additional or alternative cost.