Yuffie, Materia Hunter — ruling 1

If the target of Yuffie's last ability is illegal as the ability tries to resolve, it won't resolve and none of its effects will happen. You won't attach any Equipment to Yuffie.

Yuffie, Materia Hunter — ruling 2

Yuffie enters attacking the same player, planeswalker, or battle the returned creature was attacking. This is a rule specific to ninjutsu; in other cases, when a creature is put onto the battlefield attacking, that creature's controller chooses which player, planeswalker, or battle it's attacking.

Yuffie, Materia Hunter — ruling 3

The ninjutsu ability can be activated only after blockers have been declared. Before then, attacking creatures are neither blocked nor unblocked.

Yuffie, Materia Hunter — ruling 4

If at least one creature in combat has first strike or double strike, you can activate Yuffie's ninjutsu ability during the first-strike combat damage step. In that case, Yuffie will deal combat damage during the regular combat damage step, even if it has first strike.

Yuffie, Materia Hunter — ruling 5

You can't use Yuffie's last ability to try to attach an Equipment to Yuffie if that Equipment can't legally be attached to Yuffie.

Yuffie, Materia Hunter — ruling 6

If you lose control of Yuffie or it leaves the battlefield before its last ability resolves, you won't gain control of the target noncreature artifact.

Yuffie, Materia Hunter — ruling 7

As you activate Yuffie's ninjutsu ability, you reveal Yuffie from your hand and return the attacking creature. Yuffie isn't put onto the battlefield until the ability resolves. If Yuffie leaves your hand before then, it won't enter at all.

Yuffie, Materia Hunter — ruling 8

Although Yuffie enters attacking when its ninjutsu ability resolves, it was never declared as an attacking creature (for purposes of abilities that trigger whenever a creature attacks, for example).

Yuffie, Materia Hunter : règles, fonctionnement et interactions (MTG)

Yuffie, Materia Hunter is one of those cards players keep asking about. Here is, in plain words, what its official text says, the rulings published by Wizards of the Coast, and the combos players actually run.

Official card text

Ninjutsu (, Return an unblocked attacker you control to hand: Put this card onto the battlefield from your hand tapped and attacking.) When Yuffie enters, gain control of target noncreature artifact for as long as you control Yuffie. Then you may attach an Equipment you control to Yuffie.

How it works : Yuffie, Materia Hunter

Original English text — Wizards of the Coast / Scryfall

#1June 6, 2025· Wizards of the Coast
If the target of Yuffie's last ability is illegal as the ability tries to resolve, it won't resolve and none of its effects will happen. You won't attach any Equipment to Yuffie.
No other card is named in this ruling.
#2June 6, 2025· Wizards of the Coast
Yuffie enters attacking the same player, planeswalker, or battle the returned creature was attacking. This is a rule specific to ninjutsu; in other cases, when a creature is put onto the battlefield attacking, that creature's controller chooses which player, planeswalker, or battle it's attacking.
No other card is named in this ruling.
#3June 6, 2025· Wizards of the Coast
The ninjutsu ability can be activated only after blockers have been declared. Before then, attacking creatures are neither blocked nor unblocked.
No other card is named in this ruling.
#4June 6, 2025· Wizards of the Coast
If at least one creature in combat has first strike or double strike, you can activate Yuffie's ninjutsu ability during the first-strike combat damage step. In that case, Yuffie will deal combat damage during the regular combat damage step, even if it has first strike.
No other card is named in this ruling.
#5June 6, 2025· Wizards of the Coast
You can't use Yuffie's last ability to try to attach an Equipment to Yuffie if that Equipment can't legally be attached to Yuffie.
No other card is named in this ruling.
#6June 6, 2025· Wizards of the Coast
If you lose control of Yuffie or it leaves the battlefield before its last ability resolves, you won't gain control of the target noncreature artifact.
No other card is named in this ruling.
#7June 6, 2025· Wizards of the Coast
As you activate Yuffie's ninjutsu ability, you reveal Yuffie from your hand and return the attacking creature. Yuffie isn't put onto the battlefield until the ability resolves. If Yuffie leaves your hand before then, it won't enter at all.
No other card is named in this ruling.
#8June 6, 2025· Wizards of the Coast
Although Yuffie enters attacking when its ninjutsu ability resolves, it was never declared as an attacking creature (for purposes of abilities that trigger whenever a creature attacks, for example).
No other card is named in this ruling.
#9June 6, 2025· Wizards of the Coast
The ninjutsu ability can be activated during the declare blockers step, combat damage step, or end of combat step. If you wait until after the declare blockers step, because all combat damage is dealt at once, Yuffie won't normally deal combat damage.
No other card is named in this ruling.