The length of time an item remains in your inventory if not destroyed by you or sold (if possible). After this time, the item destroys itself. Different from the standard buff, debuff, or spell duration.

When items with a duration are stackable, units added to an existing stack will obtain the duration of that stack. Thus the timespan of items can be extended so long as items of a newer duration can be obtained.

Various items received during the Hallow's End holiday event have durations.

Examples of items with durations:

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