Cheapest priced copy (Final Fantasy): $0.35 at Card Kingdom, near mint, their price list as of .
Diamond Weapon 
Legendary Artifact Creature — Elemental · 8/8 · Uncommon · Final Fantasy · #183
This spell costs {1} less to cast for each permanent card in your graveyard.
Reach
Immune — Prevent all combat damage that would be dealt to Diamond Weapon.
Legal inCommanderBrawlStandardPioneerModernLegacyVintage
Not legal inPauper
2 printings · $0.35 to $32.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Final Fantasy | 183 | Uncommon | $0.35 | $0.49 |
| Final Fantasy | 470 | Uncommon | $3.99 | $32.99 |
One ruling from Wizards of the Coast
- 6 June 2025Diamond Weapon's prevention effect isn't considered while assigning combat damage from a creature with trample that's being blocked by Diamond Weapon. For example, if it blocks a 12/12 creature with trample, that creature's controller must assign at least 8 of that creature's combat damage to Diamond Weapon, and the remainder can be assigned to the defending player, planeswalker, or battle.