When Yasuo/Leona attacks a player holding Reavers Row with a buffed unit, what is the timing interaction between the attack triggers and Reavers Row's exit ability?

Ruling: Reavers Row resolves before Yasuo or Leona's attack triggers. The defender's unit exits the battleground before the attacker's abilities can affect it.

Sequence:

• Triggers go on the chain in order: attacker first, all other players, then defender
• Chain resolves from top to bottom (defender triggers resolve first, then other triggers, then attacker triggers)
• When finalizing targets, you choose in the order triggers were put on the chain (bottom to top), so Yasuo picks its target first, then the Reavers Row player picks their target
• Reavers Row exits the unit before Yasuo's damage or Leona's stun can apply

Nuances:

• The player holding Reavers Row can choose not to retreat and instead react with Call to Glory before abilities resolve, like in any other chain
• Since the unit exits before Leona's stun resolves, it is not stunned (the unit is no longer 'here')