When casting Bullet Time, can the opponent react after the caster decides how much power to pay during resolution?

Ruling: No, the opponent cannot react after the caster pays power during Bullet Time's resolution. The power payment happens during resolution, not as an additional cost during casting, so there is no reaction window after the amount is determined.

Sequence:

• Cast Bullet Time by paying its energy and power cost, targeting a battlefield and adding it to the chain
• Opponent may react while Bullet Time is on the chain (before it resolves)
• If opponent passes, Bullet Time resolves and the caster pays any amount of power to deal that much damage
• No reaction window exists after the power amount is paid during resolution

Nuances:

• The opponent can react before resolution (e.g., with Retreat or buffs) but must do so without knowing how much power will be paid
• The caster can respond to opponent reactions by choosing to pay 0 power after resolution if desired