Do seals add temporary mana that prevents recycling, or do they only produce power (colored resource) without providing energy (colorless resource)?

Ruling: Seals produce 1 Power of the respective color, which is an alternate way to produce power besides recycling a rune. They only produce power (the colored resource), not energy (the colorless/numerical resource).

Nuances:

• Seals do not add "one extra mana" in the sense of providing the numerical/colorless energy cost
• They provide an alternate method to produce colored power without needing to recycle