When attacking a Nine-Tailed Fox player's unit with Yasuo, Remorseful, what is the order that their triggered effects enter the chain?

Ruling: The attacker's triggers go on the chain first, then the defender's triggers, which means the defender's effects resolve first. After the initial chain resolves, the attacker will have focus and priority.

Sequence:

• Yasuo's "when I attack" trigger enters chain as C1
• Nine-Tailed Fox's trigger enters chain as C2
• Nine-Tailed Fox's effect resolves first
• Yasuo's effect resolves second
• Attacker regains focus and priority

Nuances:

• Nine-Tailed Fox is worded differently but functions as "When I defend" since legends can't have that text while working globally
• Each attacking unit triggers Nine-Tailed Fox separately, so all defending units get -1/-0