In a 2v2 game, if I use Zenith Blade (Leona's Signature Spell) to conquer with my ally's unit during my turn, who recycles a rune - me or my ally?

Ruling: The ally recycles the rune because the battlefield is conquered by the controller of the unit that conquered, not by whose turn it is.

Nuances:

• Even though the conquest happens during your turn, what matters is who controls the conquering unit
• The new controller of the battlefield determines who recycles the rune