light/universal powers are the best bet.

Learn about the Terentatek's immunity to the Force and which powers are best in Star Wars: Knights of the Old Republic. Includes companion quest details.

After speaking with the four members of the Jedi Council and being assigned your mission, return to the circular area of the enclave and proceed north. In the middle room, Elsie will be present. Speak with her, and she will apologize. Select the option 'There's no need for apologies' to complete this quest. Elsie and her new lover will then depart. Note that Dark Side players will not find Elsie in the middle room, as she will have left to find her droid. You can open the footlocker in this room for items.

Companion Conversations:

Carth: Carth expresses his desire to be kept informed and questions the Council's motives for assigning you the task of hunting star maps. He suspects there is another reason and states he will not wait to be betrayed again.

Juhani:

• Conversation 1: Juhani apologizes to you. Be kind to her to make future conversations easier and to trigger her companion sidequest. Choose to forgive her.
• Conversation 2: Ask Juhani about her past. She will describe her homeworld as a 'festering slime pit' and mention that Jedi rarely visited. She will recount her childhood dream of becoming a Jedi and her resolve to achieve it after seeing one. Maintain a kind demeanor during this conversation.
• Conversation 3: Discuss Juhani's fall to the dark side and her attack on her master. Again, be kind in your responses. This conversation will not add an entry to your journal.

After these conversations, return to the Ebon Hawk. A Jedi named Deesra will intercept you and inform you about the Terentatek, a formidable beast with a natural immunity to the Force.

Warning: The Terentatek possesses a natural immunity to the Force. While dark side powers are less affected, they can still encounter some resistance. Players with high Wisdom may find it easier to overcome this.