- Q: What happens when I use Cosmic Revelation's ability while an investigator has a card with an undefined cost (-) in their hand? A: Cards with an undefined cost (-) are not considered to have an even or odd cost while in hand. As such, they cannot be revealed nor played via the effect of Cosmic Revelation. (The Drowned City Investigator Expansion FAQ, March 2025)
Подія
Insight. Spell.
Cost: 0. XP: 1.
Choose "even" or "odd".
Each investigator reveals each non-weakness card in their hand with a cost matching the chosen option. In player order, each investigator may choose to either draw 1 card from their deck, or play 1 card they revealed from their hand (paying its cost).

FAQs
(from the official FAQ or responses to the official rules question form)Reviews
Cosmic Revelation turns a Play Action and a card in your hand into one Draw or Play action for each player at your table. Assuming you value every card in your hand as being worth one action, Cosmic Revelation's value scales proportional to the player count:
- In One-Player: Cosmic Revelation is action negative.
- In Two-Player: Cosmic Revelation is action neutral.
- In Three-Player: Cosmic Revelation effectively provides a bonus action.
- In Four Player: Cosmic Revelation effectively provides two bonus actions.
Personally, I tend to play 3-Player or 4-Player campaigns, so I expect Cosmic Revelation to become a staple at my table. Even if no one at the table needs (or can't afford) to play cards from their hand, free card draw is almost always helpful.