Name:  Sap (Calc in Japanese)

Appearance: https://i.imgur.com/uz65rKZ.gif
(*You might have to zoom out a bit to see some details properly)

Description: "This spirit represents the lifeblood of trees and plants. Sap's attack absorbs vitality from foes."

Name Origin: "Sap is a liquid substance, usually sticky, that is found in many trees. Take note that not all liquids within trees are considered sap. 'Sap' is also a verb, meaning 'to drain'.
Calc is a geological term referring to things of lime or calcium."