Previously, I was able to change my form as and when I liked. It was the power that my red energy afforded me.
However, as with all forms of energy usage, excessive use would deplete it, and if I were to keep using the red energy to withdraw and remanifest my forms, I would not be able to use it for extended periods of time.
At that moment after absorbing so much alien tech, one of the more useful utility effects I got was near instant morphing.
To avoid getting into a deeply technical discourse, I would make my explanation of the tech very short.
In brief, what the tech did was two very critical things.
The first was to allow materials to have a vastly increased capacity to store energy within them, and the second was to regulate the state of the material by manipulating said energy.