Debuff Plus

Debuff Plus is a gem effect in Xenoblade Chronicles and Future Connected. It increases the duration of any debuffs caused by the user's other equipped gems.

Overview
Debuff gems generally apply 10 seconds of their effect, so combining with Debuff Plus can increase the duration up to a maximum of 25 seconds. This is rather situational, as it requires the luck of those other gems to trigger, but it makes them much more effective when they do.