Many ideas about exorcism comes from the idea that a malevolent force can only possess you if you
let it. A strong enough willpower can defend you from possession, short of that, help you regain control.
A few christian priests in my community say that exorcisms are meant only as a means to silence the malevolent force (demon, in their words,) so that the host can hear the voice of the priest and be roused to full control, allowing the host to expel the spirit of his or her own volition.
Death? From exorcism? Death from the stress, maybe, but the exorcism itself, doubtful.
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know some exorcism spells?
Careful... spell begging is a no-no.