Still sounds like Curse— [ well, ghost-Curse and not every-other-type-Curse, ] —and other common ghost moves to me. A decent few of them involve sacrifice. Or, hmm, a toll before they can take effect.
[ Grudge, Destiny Bond, Pain Split, Last Respects, Memento ... not all ghost-type, but still common things you think about when you think about ghosts. ]
Trying to become stronger is fine. Good, even! But being aware of limitations and focusing efforts elsewhere instead is not complacency. A challenge is one thing. Driving yourself directly into a dead end tunnel, overworking your engine for no benefit to anyone, least of all yourself, is another.
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[ Grudge, Destiny Bond, Pain Split, Last Respects, Memento ... not all ghost-type, but still common things you think about when you think about ghosts. ]
Trying to become stronger is fine. Good, even! But being aware of limitations and focusing efforts elsewhere instead is not complacency. A challenge is one thing. Driving yourself directly into a dead end tunnel, overworking your engine for no benefit to anyone, least of all yourself, is another.