Grandpa Universe In Multiverse

Alexander Maxim Universe, A kind old man, a war veteran, the most renowned scientist in the world.After a life full of hardship Alexander finally completes his promise to his dead wife. He made a super-effective medicine for cancer. But his kindness was greeted with ugly politics and betrayal from his loved ones.However, something different awaited him on the other side....After his death, due to unknowingly saving the lives of billions of people, God adopted him as his son and gave him the job to purify the multiverse from sin. From that day onwards, Angels and demons called him the God's Advocate."My son, enjoy yourself while working, okay!. I don't want you to get bored from your job like Jesus. Damn, I miss Jesus, why did I send him there"***Warning - No Harem, Extremely OP protagonist, more of a slice of life story.***[1st major world - Harry Potter. Will not strictly follow the canon - Chapter 4-45][2nd major world - Game of Thrones - Chapter 47-105][3rd major world - Marvel - 107 - 228][4th major world - One Piece - 229 - 300][5th mini-world - Star Wars - 302 - 329][6th major world - Naruto - 330 - 402][7th major world - Avatar: The Last Airbender - 406 - 452][8th major world - Bleach - 460 -492][9th major world - My Hero Academia - 493 -528][10th major world - Full Metal Alchemist Bro. - 529 -584][11th major world - Dragon Ball - 595 - 663][12th Final Arc - DC World - 663 - 704] Avatar Bleach DC Universe Dragon Ball Fanfiction Full Metal Alchemist Game of Thrones Harry Potter Male Protagonist Marvel Mature Modern Knowledge Multiple Realms My Hero Academia Naruto No Romance Not Harem One Piece Overpowered Protagonist Reincarnation Star Wars Strong to Stronger World Hopping