Retribution

attacks outside af a characters turn can't be countered. Don't ask me why though, but that's just the way it is.

@leef

If a turn outside of someone turn was countered with retribution it could cause a never ending loop.

Imagine Kylo Ren A with retribution attacks Kylo Ren B with retribution. B counters, then A counters, then B counters until one is dead. Bad enough when we see similar with Biggs attacking some with retribution, then getting full tm after getting hit, then attacking them again then getting full tm when hit, then attacking them again (Used to see this all the time with Sith Trooper).

You cant counter a counter even if you have retribution
You cant counter an assist even if you have retribution