Dragon Fear question

[Lord Zardoz]

If the duration of Dragon fear expires, do opponents that failed a saving throw need to make a new save?

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[Dross]

If the duration of Dragon fear expires, do opponents that failed a saving throw need to make a new save?

I'd say yes since there is no mention that a person can only be affected once per day (like some beneficial spells/abilities do). While I can't provide a quote, i'm sure that there are some out there.