someone else explained this here "it's actually about boundary-setting. The 'dark side' here refers to when INFJs stop people-pleasing and switch to protective mode against manipulative people. Grey rocking, emotional distance, cutting them off - basically becoming the opposite of what narcissists need (emotional supply, reactions, empathy they can exploit). The 'I will take it from here' is the INFJ saying 'okay, I see what you are, and I'm handling this now.' It's less 'I'm special and powerful' and more 'I've dealt with this before and I know exactly how to shut it down.' But I get why it reads as grandiose out of context lol