If the attacking player's only unit dies during a showdown (killed by Hextech Ray with no reaction), does the showdown end immediately or can the attacking player still play action cards like Hidden Blade?

Ruling: Killing the attacking unit does not automatically end the showdown. The attacking player can still play action spells like Hidden Blade.

Sequence:

• Unit is killed during showdown
• Showdown continues
• Players can still play action cards
• Showdown ends only when both players pass Focus in a row

Nuances:

• A showdown does not end simply because one side has no units remaining
• The showdown only ends through the normal passing mechanism