Software for MMO Classes

Hello there! I’ll tryna do this really quickly!

So I love designing games in my head (just for fun) and especially LOVE mmos and speficially the classes and bosses. So I just wanted to ask if somebody knows a software that lets you easily create classes with base line talents and taken trees (kinda like wow) and add variables and being able to change theese variables (like do x damage over x time).

thank you in advance

Edit: Typo + undoing caps