Does Ornn Legend's power reduction apply to the hidden gear cost of cards like Zhonya's Hourglass?

Ruling: Ornn's power reduction does not apply to hidden gear costs. Hiding a card is not the same as playing it, so Ornn cannot be used to reduce the cost of hiding a gear.

Nuances:

• A hidden card knows nothing about itself
• There would be no logistical way to confirm the cost reduction on a hidden card