The Replenish Life magical attribute allows a character's life to be slowly refilled over time. Unlike mana, which is based on maximum mana, Replenish Life is a set value. The formula for how much life is actually replenished is as follows (where "N" = Replenish Life value): Part of why this was difficult to stack was the general rarity of items using this effect. The easiest source was to socket Helms or Body Armor with Skulls.