Hi. I had a buff that recovered 100% LP if my LP was below 30% and it had 1 and a half minute cooldown. I activated it by activating a pill and it lasted for 3 or 4 days, but I accidentally clicked on the icon to remove the buff. Does anyone know where I can get this item again? I think I originally got it from a quest.

It is known as an autopot, you can purchase both EP and LP autopots from the AH.

You get these from blue box too but they are limited. One can heal LP/EP 10000 the other one heal 100000 . The green bottle for EP and the red one LP