Chapter 4: Dragonball Super Fanfic Idea
Before Beerus goes to sleep/hybernate there was a Saiyan on an unknown planet getting stronger every day, achieving to go super saiyan and managing to control his Oozaru form.
This is a story about a saiyan who claimed the title of the strongest being in the whole universe.
Transformation Level:
Base Form: Stronger than SSGSS Goku.
1st Ascension: Super Saiyan - This form is twice as stronger than GoD Toppo.
2nd Ascension: Super Saiyan 2- This form is stronger than LB jiren/MUI Goku/SSB Gogeta.
3rd Ascension: Super Saiyan 3 - This form is slightly weaker than Whis, if Wis is 15 them MC is 13.5 in this form.
Transformation Name: (MC naming his form)
1st Ascension - Super Saiyan
2nd Ascension - Super Saiyan Primal Beast
3rd Ascension - Super Saiyan Beyond
If you are wondering why there's no SSG is because there were no saiyan to help him achieve that.
I also want to point out is that MC is a Legendary Saiyan who have a tail that's why his second transformation looks like SSJ4.
Lastly I want to point out is that his existence is hidden by Whis and only revealed when Beerus and the others are looking for another combatant in the Tournament of Power.
Weekly Power Status
-- Power
Ranking 
-- Power
stone