I'm good. A mind-controlled Holy Avenger keeps the token and all associated benefits but is no longer considered "friendly" to the Priest.
Yes the Mind Controlled creature is not Friendly to the Priest but does not gain the +2 Melee +1 Piercing on Creatures Friendly to the Priest if they damage an opposing mages creatures.
Yes but to strecth the concept"
forcemaster targets an enemy Knight of westlock, who is a holy avenger, and mind controls him
forcemaster uses the knight of westlock to wake up a thoughtspore who is asleep but attacked a temple earlier in the round.
knight of westlock adds the holy avenger bonus to that wakeup call, Good morning!
The ability is still on the knight of westlock, as any effect granted from that ability by the priest. Only the control of the creature has changed. All of the ability triggers are still there, just much harder to use.......