When attacking with Volibear Furious (which deals 5 damage) against a unit with Deflect, do you pay 1 power or 5 power for Deflect?

Ruling: You only pay 1 power to target the unit with Deflect. Volibear Furious deals 5 damage as a single instance, not five separate instances.

Nuances:

• Icathian Rain would require paying power multiple times (6 times) because it explicitly creates six separate instances of damage with "do this 6 times"
• The key distinction is whether the effect creates multiple instances of damage or one instance of multiple damage