Cheapest priced copy (Fallout): $0.49 at Card Kingdom, near mint, their price list as of .
Vault 21: House Gambit 
Enchantment — Saga · Rare · Fallout · #69
(As this Saga enters and after your draw step, add a lore counter. Sacrifice after III.)
I, II — Discard a card, then draw a card.
III — Reveal up to five nonland cards from your hand. For each of those cards that has the same mana value as another card revealed this way, create a Treasure token.
Legal inCommanderLegacyVintage
Not legal inBrawlStandardPioneerModernPauper
2 printings · $0.49 to $15.99 at Card Kingdom
One ruling from Wizards of the Coast
- 8 March 2024If a card in your hand has {X} in its mana cost, X is 0.