Whatever it was, it was eluding her right now. Perhaps her senses were distracted with the other scene happening before them... or rather, what was happening in the real world and not in her mind.
Wait. Was this her mind? Or his?
If it was hers... then she should have greater control over it than this. Vas-Tsu's knife was maybe still there... perhaps she could move it against him without him noticing.
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D8 "Where we're going we won't need eyes"? Force check to see (dropping Sense upgrade):
2eF 4 Light SideNot gonna flip because Destiny is very low now.
Thinking maybe we can try to use Force Move to stab him with Vas-Tsu's special knife, or if it's not available, our own lightsaber. Just like in The Last Jedi.