Can you exhaust a rune gear (Sigil) to pay the recycle rune cost of Sigil of the Storm battlefield?

Ruling: No, you cannot exhaust a Sigil to pay a recycle rune cost. Exhausting a Sigil and recycling a Rune are different actions that happen to produce the same resource (Power).

Nuances:

• "Rune" is a card type
• When you recycle a Rune, you get the resource called "Power"
• Sigils also give you Power when you exhaust them
• Exhausting a Sigil is not the same as recycling a Rune, even though both produce Power