The One Piece - New Territories

This modpack creates an adventure for the player where they have to travel the seas to find devil fruits which make them powerful, the more people they fight the stronger they get and eventually the player will be strong enough to slaughter dragons. You can play this modpack in singleplayer or even in a pre-made server, you can even use the ESSENTIAL mod in order to play together with your friends for free.

Become stronger, find devil fruits, obliterate your enemies, slaughter dragons, and rule the seas!

And most importantly, try not to die. Unless you want to lose all of your power...

I would recommend installing OptiFine as well if you want to add shaders or if you want your experience to be better in general: OptiFine.