Can you add Repeat to Falling Star even though it already triggers twice?

Ruling: Yes, you can add Repeat to Falling Star. When you Repeat Falling Star, its text becomes duplicated, so you get "Do this twice: Deal 3 to a unit" twice, for a total of 12 damage.

Nuances:

• Repeat can stack on cards that already have Repeat, resulting in multiple instances (e.g., "threepeat" if you put Repeat on something with Repeat)
• The cost is steep: 4 Energy and 4 Fury, plus 1 power for the gear