Cheapest priced copy (Final Fantasy): $6.99 at Card Kingdom, near mint, their price list as of .
The Darkness Crystal 
Legendary Artifact · Rare · Final Fantasy · #335
Black spells you cast cost {1} less to cast.
If a nontoken creature an opponent controls would die, instead exile it and you gain 2 life.
{4}{B}{B}, {T}: Put target creature card exiled with The Darkness Crystal onto the battlefield tapped under your control with two additional +1/+1 counters on it.
Legal inCommanderBrawlStandardPioneerModernLegacyVintage
Not legal inPauper
3 printings · $6.99 to $15.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Final Fantasy | 96 | Rare | $6.99 | $6.99 |
| Final Fantasy | 335 | Rare | $14.99 | $15.99 |
| Final Fantasy Promos | 96s | Rare | — | $15.99 |
5 rulings from Wizards of the Coast
- 6 June 2025If The Darkness Crystal leaves the battlefield at the same time as one or more nontoken creatures an opponent controls would die, those creature cards will be exiled and you'll gain 2 life for each of them.
- 6 June 2025If a creature token an opponent controls dies, it goes to that player's graveyard as normal before ceasing to exist.
- 6 June 2025To determine the total cost of a spell, start with the mana cost or alternative cost you're paying (such as a flashback cost), add any cost increases (such as kicker costs), then apply any cost reductions (such as that of The Darkness Crystal's first ability). The mana value of the spell is determined by only its mana cost, no matter what the total cost to cast that spell was.
- 6 June 2025While you control The Darkness Crystal, abilities that trigger whenever a nontoken creature an opponent control dies won't trigger because that card is exiled instead.
- 6 June 2025The cost reduction applies only to generic mana in the total cost of black spells you cast.