If I cast Hextech Ray and my opponent responds with Fight or Flight, does Hextech Ray fizzle?

Ruling: Hextech Ray does not fizzle. In Riftbound, spells don't fizzle - instead they "whiff," which means the spell resolves but has no effect because its target is no longer valid.

Nuances:

• Riftbound does not have fizzling as a mechanic
• Whiffing is functionally similar to fizzling except the spell still resolves