If you change a Power's speed, which phase can you Repeat it in?

If you change a Power's speed, which phase can you Repeat it in?

Whatever matches the speed the Power was most recently set to, which will almost always be the speed of the original use of the Power.
There are a few unusual cases:
  • If you use a Fast Power (or Power that was made Fast) in the Fast Phase, and then make that Power Slow with "Sky Stretches to Shore," it's now a Slow Power and can only be Repeated in the Slow Phase.
  • Fractured Days Split the Sky's "Slip the Flow of Time" Innate Power, the Air Marker of the Intensify Aspect, and a few Events ("Outpaced," "Ethereal Conjunction," and "Rouse the Spirits") all let a Spirit use a Power at a particular time without changing that Power's speed for any further uses of that Power.
  • The speed of a Power doesn't matter for Repeats immediately triggered by Relentless Gaze of the Sun's "Relentless Punishment" Special Rule, the Locus Aspect's "Strength of the Waking Island" Innate Power, or a "Repeat this Power" threshold — the power is repeated right after the original use no matter the current game phase.