Can attack/defend triggers activate multiple times in the same combat, such as if a unit moves into a battlefield or arrives late?

Ruling: Each unit can only trigger their on attack or on defense trigger once per combat. If a unit arrives late to attack or defend during a combat, it does get the trigger the first time the attacker/defender status is applied to it in that combat.

Sequence:

• When a combat begins, units with attack/defend triggers can activate them
• If a unit arrives late to the combat, it triggers when attacker/defender status is first applied
• The same unit cannot trigger again in that same combat
• If the combat ends and a new combat starts, triggers can activate again

Nuances:

• This rule only applies to attack/defend triggers, not to other triggers like conquer triggers (such as Sett's)
• Conquer triggers can activate multiple times per turn if the condition is met multiple times