We got official response "Drokkatta's Demolish ability is unfortunately missing some necessary timing text and will be receiving errata in the next FAQ. Demolish should begin with "Use during your activation."With this in mind, during each of Drokkatta's activations, you can use Demolish one time."

Hello, we have a question about the rebel hero Drokatta (released in the Heart of the empire expansion):I was wondering if we are playing Drokatta's ability correctly. I'm talking about the demolish ability: It says "limit once per activation". What is meaned by that?1. Once every rebel hero's activation2. Once every Drokatta's activation3. Once every players activation (rebel+imperial players)Since we really don't know it and have different opinions, we've decided not to continue playing until this rule is clarified. Does somebody know how to play this ability?