If a unit attacks at Battlefield A (triggering Ahri's -1/-1 effect), then uses Ride the Wind to move to Battlefield B, does Ahri's Legend ability trigger again to give an additional -1/-1?

Ruling: Yes, Ahri's Legend ability triggers again when the unit moves to the second battlefield she controls, giving an additional -1/-1 for a total of -2/-2.

Sequence:

• Unit attacks at Battlefield A controlled by Ahri, receives -1/-1
• Unit uses Ride the Wind to move to Battlefield B (also controlled by Ahri)
• Ahri's Legend ability triggers again, giving another -1/-1
• Unit has -2/-2 total this turn

Nuances:

• This only works if Ahri controls both battlefields being attacked
• Each trigger gives -1/-1 "this turn" as separate effects that stack