When Blue Ezreal is defending, can he deal 3 damage and use his move ability to leave the battlefield?

Ruling: Yes, Blue Ezreal can deal 3 damage and leave the battlefield when defending. His damage ability is an initial chain trigger, and his move ability is an Action speed Activated Ability that can be used when he has Focus and the chain is empty.

Sequence:

• Blue Ezreal's damage ability triggers as an initial chain trigger
• After the chain resolves and is empty, if Ezreal has Focus, he can activate his Action speed move ability to leave the battlefield

Nuances:

• The move ability is Action speed, not Reaction speed, so it cannot be used in response to spells like Charm or Hidden Blade
• If Charmed to a battlefield, Ezreal can use his Focus to move from the battlefield
• Hidden Blade does not create a showdown, so Ezreal would not have the chance to use his move ability in that case
• Using the move ability to leave the defending battlefield does not cause Ezreal to become exhausted