Increases duration of weapon effects by 10% per rank.

Evolution material for Unholy Vespers (King Bible) and a Duration boost for all time-limited weapons. Extends the active window of Garlic, Santa Water, and other persistent-zone weapons. With XVII Lost & Found Painting, the Duration ceiling extends further, enabling near-permanent coverage.

Mandatory in King Bible builds. Stacks well with XVII Lost & Found Painting for maximum duration. Universally useful for any weapon that relies on active duration.