If you play Stacked Deck and see a Nocturne, can you float an energy then recycle the rune during the resolution of Stacked Deck?

Ruling: Yes, you can float energy and recycle the rune. When you choose to play Nocturne from the reveal, you place it on the chain as a pending item and pay its cost (1 universal power) during finalization, not during Stacked Deck's resolution.

Sequence:

• Stacked Deck resolves and reveals Nocturne
• You choose to play Nocturne, placing it on the chain as pending
• Stacked Deck finishes resolving
• During finalization of Nocturne, you pay the 1 universal power cost
• At this point you can float energy and recycle runes

Nuances:

• The payment of the universal power cost happens during finalization, not during Stacked Deck's resolution
• Nocturne's "play me for [power]" is treated as a cost replacement effect
• The templating on these types of effects (Nocturne, Flame Chompers, Phoenix) is acknowledged to be unclear and may be improved in future versions