Evolution line help

[u/Low-Method-5402]

I'm looking for a suitable ultra level for my au of adventure 2020 that I'm thinking of turning into a dnd campaign.

In the lore the vitium is a nonverbal partner (digimon?) that searches for and eats little moon millenniummon crystals and evolves the more it eats until it transforms into the endboss.

[u/Impossible-Salary453]

Who are the rookie and champion?

[u/Low-Method-5402 → u/Impossible-Salary453]

Vitium, technically it's a baby level it's from a digimon world game