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Garlic Jr. becomes immortal

Immortality (, Fushi), also called Eternal Life (, Eien no Inochi), is the concept of living in physical or spiritual form for an infinite length of time without dying. There are several outside methods in the series which can be sought after in order to become immortal, the most common being to make such a wish to the Eternal Dragon, Shenron, using the seven Dragon Balls.

Frieza gaining immortality in Dragon Ball Z: Budokai

Frieza after wishing for an immortal body in Supersonic Warriors

Even if one is immortal, there is one crucial flaw, which is that, even though they are immortal, they are still susceptible to being trapped in a place where they cannot escape, be it a different time era, dimension, etc. They are also susceptible when fusing with a mortal being, spiraling the fused body out of control, causing the fusion to be granted with semi-immortality, susceptible to being killed. They also susceptible to being erased from existence by certain entities such as the Omni-King. There are examples of these such as:

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