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From The re-PSUPedia
This status effect lowers the ATP stat (physical attack power). The Fire TECHNIC Jellen can cause this effect. It can be overriden if the target has the Boost ATP status inflicted upon them.
LV 1: 11% decrease for 30 seconds
LV 2: 15% decrease for 60 seconds
LV 3: 19% decrease for 90 seconds
LV 4: 23% decrease for 120 seconds
LV 5: 27% decrease for 150 seconds