Life leech, introduced with Updates/10.94, is a way to receive health points from your opponent during fighting. It used to be called Hit points leech before the name was changed to Life leech. It was initially available via Charging (which was removed with Updates/11.40) and later also by Imbuing certain equipment. When imbued, the item will receive a life leech amount value (5%, 10% or 25%), which you will get as health when you cause damage, if the item is equipped.