I have a question: Why no one can assist or counterattack, as long as the have Leia's 'Bluff'?
Enemies can’t, because that’s how the ability works:
“If all allies were Hutt Cartel at the start of battle, enemies with Deadly Bluff can't attack out of turn and if they have both Deadly Bluff and Thermal Detonator, they lose 25 Speed.”
Replies
Go to Journey Guide and then Galactic Legends. There you can see what you need to get him and start the journey when you are ready.
Enemies can’t, because that’s how the ability works:
“If all allies were Hutt Cartel at the start of battle, enemies with Deadly Bluff can't attack out of turn and if they have both Deadly Bluff and Thermal Detonator, they lose 25 Speed.”
Yes. It's written in the first line of the Ultimate Ability.