When a boss ability recalls Sett, Brawler with a buff and that action results in conquering the battlefield, does the boss get readied and does Sett, Brawler get a new buff?

Ruling: The boss gets readied from its ability, but Sett, Brawler does not get a new buff.

Sequence:

• Boss ability recalls Sett, Brawler from the battlefield
• The battlefield is conquered as a result
• Boss readies due to its ability
• Sett, Brawler does not receive a new buff because he was not on the battlefield when the conquering happened

Nuances:

• A character must be on the battlefield at the moment of conquering to trigger conquest-related effects