Due to living for 400 years and travelling for most of them, Spriisyn has been to many worlds and systems. To this extent, he has also eaten many things. While its not required, it greatly helps Spriisyn to eat something before being able to transform into it. When he has already eaten something and transforms into it, he can inherit its physical traits and characteristics for a brief time. To maintain transformations, Spriisyn can eat more food, not necessarily of his form, just energy to sustain the transformation. Spriisyn can split apart into smaller slimes, however, if he's forgetful, he can forget to collect their minds, making the slimes sentient and with little/no knowledge, and only the base instincts of what they transform into. The small slimes retain their transformation by consuming food, and the particular species they transform into is quite voracious. It'll be a situation where multiple predatory top carnivores are mixed with the Tarrins body composition, making them more resilient and able to scale walls. For a hint on what he turns into, it has more than four legs.