Can you float energy (or power) while resolving an effect that requires you to pay a cost, specifically when the resource you're floating is different from the resource being paid (e.g., floating energy while paying power for Nocturne or Bullet Time)?

Ruling: Yes, you can float energy or power while resolving an effect that requires you to pay a cost, even if the resource you're floating is different from the resource being paid. Activated abilities that Add resources with the Reaction tag can be activated any time resources are being paid during resolution.

Sequence:

• When an effect requires you to pay a cost during resolution (like Nocturne requiring power or Bullet Time recycling runes for power)
• You can activate any Add-Reaction abilities at that time
• This allows you to float energy even when paying power, or vice versa
• The floated resource remains available until end of turn or used

Nuances:

• The rule text "any time that those spells or abilities require that resources be paid" uses "that" as a connector word, not as a limitation to "that specific resource" - it refers to any time resources are being paid
• This is particularly important for cards like Bullet Time where you don't know in advance how much you'll need
• You cannot react to the act of adding/floating resources itself