Does Sett Leader's effect heal the unit when preventing death, specifically when a 6 might unit with 3 damage marked is targeted twice by Falling Stars?

Ruling: Sett Leader has been errata'd. Based on the context, the original poster's concern about whether the unit would survive being targeted twice suggests the errata clarified the interaction.

Nuances:

• The specific interaction involves multitarget spells like Falling Stars targeting the same unit multiple times
• The errata addressed confusion about the card's text/functionality