If green Leona is on a battlefield with 2 enemy units (Sprite Mother and its token), and Sprite Mother is stunned (reducing it to 1 power), does Convergent Mutation set Sprite Mother to 3 power or does it stay at 1 power due to Leona's -8 aura?

Ruling: Sprite Mother would be set to 3 power. The game applies positive modifiers before negative modifiers, and since Leona's ability is an aura effect (not a snapshot effect), it applies last after Convergent Mutation's set effect.

Sequence:

• Convergent Mutation sets Sprite Mother's power to 3
• Leona's -8 aura applies after as a negative modifier
• Final result: Sprite Mother has 3 power

Nuances:

• Leona (Zealot) always applies last
• Aura effects like Leona's don't snapshot, unlike triggered abilities such as Ahri's
• This interaction is expected to be clarified in an updated Comprehensive Rules