Cheapest priced copy (Final Fantasy): $0.49 at Card Kingdom, near mint, their price list as of .
Ninja's Blades 
Artifact — Equipment · Rare · Final Fantasy · #108
Job select
Equipped creature gets +1/+1, is a Ninja in addition to its other types, and has "Whenever this creature deals combat damage to a player, draw a card, then discard a card. That player loses life equal to the discarded card's mana value."
Mutsunokami — Equip {2}
Legal inCommanderBrawlStandardPioneerModernLegacyVintage
Not legal inPauper
2 printings · $0.49 to $6.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Final Fantasy | 108 | Rare | $0.49 | $0.79 |
| Final Fantasy Promos | 108s | Rare | — | $6.99 |
5 rulings from Wizards of the Coast
- 6 June 2025You may pay the Equipment's equip cost as normal to move it from the Hero token to another creature you control.
- 6 June 2025If the Hero token is destroyed, the Equipment stays on the battlefield.
- 6 June 2025The Hero token enters as a 1/1 creature, then the Equipment becomes attached to it. Abilities that trigger when a creature enters the battlefield see that a 1/1 creature entered the battlefield.
- 6 June 2025If the job select ability causes two Hero tokens to be created (due to an effect such as that of Doubling Season), the Equipment becomes attached to only one of them.
- 6 June 2025If the discarded card has {X} in its mana cost, X is 0 for the purpose of determining its mana value.