Can Mystic Reversal be played after the player who played Bullet Time has recycled X amount of runes?

Ruling: No. Mystic Reversal must be played before Bullet Time resolves. The power cost for Bullet Time (recycling runes) is paid during resolution, and you cannot play spells during another card's resolution as there is no priority window at that time.

Sequence:

• Bullet Time is played
• Priority window exists where Mystic Reversal could be played
• Bullet Time resolves (runes are recycled as part of resolution)
• No priority window exists during resolution to play Mystic Reversal

Nuances:

• Reminder text on cards is not rule text and does not override priority window rules
• You must play Mystic Reversal in a priority window before Bullet Time begins resolving