The value of X is checked only once, as Terror Tide resolves.
Terror Tide
Cards with the ability word "fathomless descent" have abilities that care how many permanent cards are in your graveyard.
Some descend triggered abilities include intervening "if" clauses (i.e. "if you have [four or eight] permanent cards in your graveyard" in the middle of the ability). Each of these abilities checks your graveyard at the moment it would trigger to see if it does. If you don't have the required number of permanent cards in your graveyard at that time, the ability doesn't trigger at all. If it does trigger, it will check again as it tries to resolve. If you don't have the required number of permanent cards in your graveyard at that time, the ability won't resolve and none of its effects will happen.
Last observed on Scryfall 2 months ago at $0.34. Over the trailing 90 days the price moved between $0.02 and $0.36 across 58 observations. Cross-checked across TCGplayer, eBay sold, Cardmarket EU, and Star City.
This printing is one of 3 catalogued treatments from LCI — the lineup includes Foil and Nonfoil alongside the standard finish. Across our catalog the Rarix library tracks every variant in the same family so collectors can compare price, scarcity and demand inside a single lineage.
Card #127 of *The Lost Caverns of Ixalan*, the set that shipped alongside the November 2023 The Lost Caverns of Ixalan release.
Card type: Sorcery, color identity black, printed at rare. Rares occupy the bottom-of-pack rare slot in standard boosters. Mana cost: {2}{B}{B} (4 converted). Keyword abilities: Fathomless descent.
Legal across the major constructed formats — Modern, Legacy, Vintage, and Commander — plus Standard rotation play.
EDHrec ranks this card #6,164 in Commander, putting it in the niche-pick tier of the format's playable pool.
Illustrated by Brock Grossman. Rarix catalogs 33 other cards credited to this artist.
Magic: The Gathering · ™ & © Wizards of the Coast · Illus. Brock Grossman
Card data via Scryfall. Rarix is fan-made; not endorsed by the rights holders.

























