If Volibear is killed in response to his attack trigger, does his ability still deal damage?

Ruling: The triggered ability resolves, but since Volibear is no longer at a location, "here" doesn't reference anything valid and the ability fails to find its targets. No damage is done.

Sequence:

• Volibear attacks and triggers his ability
• Hidden Blade kills Volibear in response
• The triggered ability resolves
• The ability fails to find targets because "here" is undefined (Volibear is no longer at a location)
• No damage is dealt