Can you recycle runes during the resolution of Bullet Time to pay for its power cost, or can runes only be recycled when you can use a reaction?

Ruling: You can both exhaust and recycle runes during Bullet Time's resolution to pay for its power cost. You do not need to float the power beforehand.

Sequence:

• Bullet Time begins resolving
• During resolution, exhaust runes for floating energy
• Use that floating energy for power as part of the resolution
• Continue resolving Bullet Time's effect

Nuances:

• This can be done during resolution itself, not requiring the ability to use a reaction
• The power cost is paid during resolution, not before the spell resolves