Does Yasuo Remorseful's ability trigger Deflect if there's only one enemy unit in the battlefield that has Deflect?

Ruling: Yes, Yasuo Remorseful's ability triggers Deflect, but you can choose to not pay the Deflect cost and therefore not finalize Yasuo's trigger to the chain.

Sequence:

• Yasuo's ability triggers and targets the unit with Deflect
• Deflect triggers, requiring a cost to be paid
• You can choose not to pay the Deflect cost
• If you don't pay, the ability doesn't trigger/finalize to the chain

Nuances:

• You would choose not to pay if you were looking to win via combat anyway