When a unit on Reavers Row is attacked and retreats to base using the battlefield ability, can the defending player still use their stacked cards afterward?

Ruling: Yes, the defending player can use their stacked cards after retreating the unit from Reavers Row to base.

Sequence:

• Unit on Reavers Row is attacked
• Defender uses battlefield ability to move unit to base
• Showdown continues
• Defender can still use stacked cards
• Showdown ends only when both players pass without starting a chain

Nuances:

• Moving a unit to base does not end the showdown