Does Purple Ezreal's cost reduction ability affect Bullet Time's Universal Power cost?

Ruling: No, Purple Ezreal does not make Bullet Time cheaper. Bullet Time's Universal Power cost is paid on resolution, not as an additional cost when playing the card, so Ezreal's ability does not apply.

Nuances:

• Optional additional costs must be formatted with "you may ___ as an additional cost to you play [this]" or "as you play [this], you may pay ___" - both the "as you play" timing and "may" are key features
• Ezreal's ability only reduces optional additional costs (like Accelerate or Repeat), not base costs or costs paid on resolution
• Multiple Ezreals can stack to reduce the same optional additional cost
• When calculating costs with both increases (like Vex) and reductions (like Ezreal), apply additional costs first, then cost increases, then cost reductions
• Universal Power (:UniversalPower:) can be paid with any power type, and Ezreal's reduction can reduce any power type in an optional additional cost