Using the skill will use up the source power. For example, in Act I, there are multiple pools of source water in The Hollow Marshes and another in the Necromancer's Tower Divinity Original Sin 2 Max Source Points.
When a character with an empty Source Point slot stands on a surface of Source water, they will absorb the surface and gain a Source Point. In Divinity Original Sin 2, there are some areas covered with Source water. Home Divinity: Original Sin 2 max source points
