I feel like the whole "hallucination-attack, by showing a nostalgic vision of the past" is only effective in giving pause to someone. To "stun" them for a moment.
Because, really, if you have a traumatic moment where people you cared about were gruesomly murdered, a non-moron MC would just be pissed the fuck off you "dared to go there" and triple-down on killing you. Rather than "pull down their spirits", you just spike them the fuck up.
And I'm writing all of that, because I've seen too many comics where the MC is too easily lead to believe the illusion is real, and starts sobbing and crying that "you're alive" and whatnot like a fucking idiot, as if they cannot remember they were just now fighting someone, a literal moment ago, and instantly understand that it's all bullshit.
P.S: Now I'm wondering if this trope is actually a part of that "Overlord list of what-not-to-do against the forces of good". :u
EDIT: It isn't, derp. They should add it.