Hey everyone!  I m trying to create a magic item that rerolls it's damage dies automatically when they roll a 1 or a 2 (basically the same as Great Weapon Fighting). Could someone tell me how to do this?
As an option I've also thought of creating a feat that does this same thing (since the character is only going to attack with that magic weapon it would be fine). Or maybe if it s possible just adding the fighting style to the character somehow

The fighting style doesn't even work to automatically reroll 1s and 2s (partly because the functionality doesn't exist and partly because the player actually has a choice of whether or not to reroll).

There is no way to do this automatically. You'll have to just include the feature in the item's description and leave it to your player to re-roll manually.

Thanks so much, sad it s not implemented :(

Which player would choose not to reroll anyways hahaha

Rerolling a 2 could make it a 1. That is why it's a choice. Yes the average means it likely won't end up less - but it could.

If you use beyond 20, it might do this for you. It works for GWF

I use beyond20, where is the option? or it just does it automatically if you have GWF?

Now that i m talking about hombrew items and beyond20, is there a way to do the  -5/+10 automatically as well?

GWF is automatically done.

You can use a hot key for great weapon master 

where is that option / where can i bind the hotkey?

open beyond 20 and then go to more options, it's about half way down -define custom hotkeys, there's a big blue option button