When Leona attacks a unit on Reavers Row, does the Reavers effect need to be declared before Leona declares who she stuns?

Ruling: Leona chooses her stun target first, then the defending player chooses the Reavers Row effect, then both "when defending" and "when attacking" effects resolve.

Sequence:

• Leona (attacker) makes her choice
• Defending player makes their choice
• Resolve "when defending" and "when attacking" effects