Can a Rune deck contain cards from both domains of a Legend, or only from the single domain of the chosen Champion?

Ruling: Rune deck cards can be from any domain contained in the Legend's Domain Identity. If your Legend is two-domain (e.g., purple/orange), you can have runes that are all purple, all orange, or a mix of both.

Nuances:

• The rule text saying "Domain Identity of your Chosen Champion" is considered poorly worded; it should refer to the Legend's Domain Identity
• The chosen Champion's domain must be contained within the Legend's Domain Identity
• In Limited format, you can have 3 domains