How do Fae Dragon's buffs interact with units that already have buffs, including whether you can target the same unit multiple times, target already-buffed units, and whether buffs can be added via reactions?

Ruling: You target up to four different units with Fae Dragon, each receiving one buff. You can target units that already have buffs, but this won't add additional buffs to them (except for Lee Sin Ascetic). When spending a unit's buff (like with Sett Legend ability), you spend one buff at a time.

Sequence:

• When Fae Dragon's ability is played, you choose up to four different units as targets
• Each chosen unit gets one buff when the ability resolves
• If a unit already has a buff when the ability resolves, it won't gain an additional buff (except Lee Sin Ascetic)
• If you react with Call to Glory after targeting a buffed unit, that unit can gain a buff if it's no longer buffed when Fae Dragon's ability resolves

Nuances:

• Lee Sin Ascetic is an exception that can receive multiple buffs
• Targeting an already-buffed unit is legal for purposes like triggering Sett Legend ability multiple times, even though it won't add extra buffs
• Reactions that remove buffs before Fae Dragon's ability resolves can allow a unit to receive the buff