Rule 135.2.e.6.c

A [C] shorthand on a card with multiple Domains is processed as any power of that card’s Domains. Example: Defiant Dance is a Calm and Chaos spell. Its cost is [1][C]. The power component of that cost can be paid with either [G] or [P]. Example: Tibbers is a Fury and Chaos Unit. If Tibbers is granted the Accelerate keyword, the power component of the optional additional cost can be paid with either [R] or [P].