Does Spirit's Refuge grant deflect to all buffed units permanently, or only to units that are buffed at the time it's played?

Ruling: Spirit's Refuge is a gear that stays in your base. Its passive ability affects all your units continuously - whenever a unit has a buff on it (at any time), it gains deflect.

Nuances:

• "Buff" is a specific keyword - abilities that don't explicitly use the word "buff" (like Leona's "shield" ability) are not buffs and won't trigger Spirit's Refuge
• The effect is ongoing: units that receive buffs after Spirit's Refuge is played will also gain deflect