Can you use Call to Glory to give Fiora Deflect after she's been targeted by a spell to force the opponent to pay the Deflect cost?

Ruling: If a unit gains Deflect after already being targeted by a spell, the opponent does not need to pay the Deflect cost.

Nuances:

• Against Reflexive Spells (like Rain and Star) there is a window to respond before target selection, so you can give Deflect before targeting occurs and force the Deflect payment
• Against non-Reflexive Spells, the targeting happens before you can react, so gaining Deflect afterward does not require payment