If Yasuo targets a unit in one battlefield zone, but the opponent uses Tideturner to switch that unit to a different battlefield zone before Yasuo's ability resolves, does Yasuo's ability fail?

Ruling: Yes, Yasuo's ability whiffs (fails to resolve). The targeted unit must be in the same location as Yasuo when the ability resolves for him to strike it.

Sequence:

• Yasuo targets unit A in battlefield zone 1
• Opponent reveals Tideturner in battlefield zone 2
• Tideturner switches unit A to a different zone
• Yasuo's ability resolves but fails because unit A is no longer in the same location