Rule 805.1.a

Accelerate is functionally short for "As you play me, you may pay [1][C] as an additional cost. If you do, I enter ready."

• 805.1.a.1 If the unit has one or more domains, the Power portion of the Accelerate cost can be paid only with a Power that…
• 805.1.a.2 If the unit has no domain, the Power portion of the Accelerate cost can be paid with [A] (a Power of any domain).

Official Core Rules