A ghostly vision (Divinity: Original Sin 2)

When passing this skill I understand gives the lizard on the gallows near the driftwood, my partner did not like her arrogance and we decided it to kill, are there any other ways to get this skill, or is it, now all the quests with the skill associated bye-bye? To boot it is not an option, because it was the beginning of the act, and we have explored 75% of Loki(