When Volibear, Furious attacks into Reaver's Row, what is the order of trigger resolution?

Ruling: Reaver's Row's "When you defend" trigger resolves first, allowing the defender to move a unit to base before Volibear's "When I attack" trigger resolves and deals damage.

Sequence:

• Volibear moves to Reaver's Row to initiate combat
• Volibear's "When I attack" trigger is placed on the chain first (attacker places triggers before defender)
• Reaver's Row's "When you defend" trigger is placed on the chain second (defender places triggers last)
• Both players may play reaction cards
• Chain resolves in Last-In, First-Out (LIFO) order:
  • Reaver's Row resolves first: defender chooses whether to move a unit back to base
  • Volibear's trigger resolves second: deals 5 split damage to remaining valid targets

Nuances:

• Targets must be chosen when triggers are placed on the chain, before any resolution occurs
• If Volibear targeted a unit that was moved to base by Reaver's Row, that unit is no longer a valid target when Volibear's damage resolves and takes no damage
• The key principle is that while attackers place triggers on the chain first, defenders' triggers resolve first due to LIFO resolution order