During a showdown, can you use Flight or Fight after passing focus initially if your opponent uses reaction spells?

Ruling: Yes, you can use action spells like Flight or Fight after initially passing focus if your opponent starts a chain with reaction spells.

Sequence:

• Attacker passes focus during showdown
• Defender uses reaction spells to buff their stats
• Chain resolves
• Attacker receives focus again and can now use action spells
• Combat only moves to the next step when both players pass focus without starting a chain