If a unit is saved with Sett's ability, does its combat damage still go through?

Ruling: If the unit died during the combat damage step, yes, its damage still goes through because all units deal damage before the game checks for lethal damage. If the unit died during the showdown to an ability or spell, then no.

Sequence:

• All units deal combat damage simultaneously
• After damage is dealt, the game checks which units have lethal damage marked
• Units with lethal damage then die

Nuances:

• The timing of when the unit died matters (combat damage step vs. showdown from ability/spell)
• During combat damage, damage is dealt before any unit actually dies from that damage