By drinking this essence, you gain the ability to absorb other beings!
*You gain aspects of the appearance of the being you absorb, such as muscletone, hair color, eye color, etc; You only gain the positive aspects you want, and none of the negatives.
*You become physically stronger with each person you absorb, with exactly how strong depending on the target. This can also suffer diminishing returns if you constantly target civilians or Joe Average.
*You gain their memories, everything from childhood up to the moment they met you for the last time. This allows you to know everything from what they had for breakfast to codes for their computer network.
*You can also choose to gain some personality traits, making you braver, more curious, angrier, and so on. This will NEVER be enough to cause death of personality.
*Having absorbed the victim, you gain access to a store of any energy they used to power their techniques. You can increase this reservoir of energy by absorbing others who use it.
*By absorbing the victim, you gain any powers or abilities they had, no matter how unique or metaphysically tied to them it was.
*What exactly happens to the victim after you absorb them is up to you. They may die, or they could linger inside your own mind, offering advice or bemoaning their fate. In cases such as the latter, you can "mute" them at will.