How do Seals work in Riftbound, particularly regarding what costs they pay and how they interact with runes?

Ruling: Seals enter play ready and can be exhausted to pay for Power costs (the colored domain symbols below the energy cost) instead of recycling runes. They do NOT pay for Energy costs (the number in the top left circle), which still requires exhausting runes.

Sequence:

• To play a Seal card, you must pay its energy cost (exhaust runes) and recycle a rune of the matching color
• The Seal enters play ready
• Once in play, you can exhaust the Seal to provide Power of its color for future cards
• You can use a ready Seal to pay the Power cost of another Seal card

Nuances:

• Seals provide net-even Power (not Energy) on the turn they're played since they enter ready
• With 2 Seals already in play at 12 mana, you effectively have access to 14 Power worth of resources
• Seals can be reused across multiple turns since exhausting them doesn't recycle them
• You can exhaust a Seal to pay the Power cost for playing another Seal, but still need to pay the Energy cost