When seeing a Nocturne with no runes tapped, can you float a rune mid-resolution and recycle it to pay Nocturne's cost instead of losing Energy?

Ruling: Yes, you can float a rune when paying for Nocturne and recycle it to pay his cost. You are not obligated to lose Energy.

Sequence:

• Float a rune mid-resolution when paying for Nocturne
• Recycle that floated rune to pay Nocturne's cost

Nuances:

• This interaction was confirmed by official Riot sources ("red text")
• Floating mid-resolution is allowed as long as you have a cost to pay