Elderberry

The Elderberry is a craftable post-Moon Lord permanent power-up item that increases the player's maximum life, as an extension to Life Fruits. There are 3 other items that function identically to this: the Blood Orange, the Miracle Fruit, and the Dragonfruit. It is the third of these to be obtainable following boss progression. It can only be used once, and after that the player must use one of the remaining fruit to increase their maximum life. With all of these, the player's maximum life is capped at 600.