How do you distinguish between [A] (any power) and [C] (colored power) symbols on Riftbound cards when no oracle text is published?

Ruling: Rainbow-colored symbols indicate [A] (any power/any domain), while solid colored symbols indicate [C] (power of that specific domain/color).

Sequence:

• Look at the symbol's coloring: rainbow = any power, single color = that color's power
• Alternatively, check the symbol's shape: generic domain symbol (rainbow-colored) = any power, while domain-specific shapes (Fury, Mind, etc.) = that domain's power

Nuances:

• Both Sett The Boss and Kai'Sa, Daughter of the Void have rainbow rune icons, meaning [A] (any power)
• In Sealed, you can recycle a Red Rune for Sett's ability or tap Kai'Sa for Yellow power because they use [A]
• The distinction matters in all formats, not just Sealed