At the satrt of your wolrd with the All Origins Modpack you will find yourself in a world where everyone can choose different abilities/Origins. Every origin has its pros and cons some can fly but only wear light armour and others are only half a block tall.

Origins:

Alien Axolotl
Anomaly
Artificial Construct
Automaton
Beaver
Bedrockean
Binturong
Bird
Black Mage
Blazian
Blob
Boarling
Broodmother
Calamitous Rogue
Candyperson
Child of Cthulhu
Chimaera
Cobra
Copper Golem
Corrupted Wither
Craftsman
Deathsworn
Demi God
Deranged
Devine Architect
Dolphin
Drakonwither
Dullahan
Earth Spirit
Ebon Wing
Emblazing Warrior
End Mage
Enigma
Fallen Angel
Felvaxian
Flea
Frog
Gaia
Ghast
Giant
Glacier
Gnoll
Golden Golem
Goolien
Half Wither
Hellforged
Hero of the Wild
Ice King
Ice Porcupine
Iceling
Ignisian
Illusioner
Insect
Jellyfish
Kelperet
Kirin
Land Shark
Lepus
Lost Draconian
Lunar Path
Magmean
Malfunction
Manipulator
Marshmellow
Moth
Mothling
Mountain Goat
Mouse
Ninetails
Panoptican
Part Robot
Pixie
Ram
Raptus
Rat
Ravager
Red Panda
Reign Farmer
Rift Mage
Ryu
Sand Walker
Shadow
Shadow Crawler
Shifter
Shroomling
Snake
Soulseer
Spectre
Spirit Ram
Sporeling
Sprinter
Stargazer
Sunken Sailor
Technomancer
The Wailing One
Thornling
Triangulon
Vishaichian
Void Samurai
Voidborne
Volcanic Dragon
Wanderer
War God
Warden
Warforged
Warper
White Mage
Witch of Ink
Withered Fox
Withered Skeletian
Wizard
Wondering Spirit
Wyvern
Zero Aizawa

Floran

Truffle

Inchling

Piglin

Enderian

Merling

Phantom

Elytrian

Blazeborn

Avian

Arachnid

Shulk

Feline

All the Origins you'll need