Hybrid Magic/Player level up

Being able to cast spells would be so fun that I'm surprised there's nothing like that yet in the actual game, spells like Fire ball as an example or farming spells like a Plant All spell and a Harvest All spell or even a levitate spell. But in order for you to be able to even cast spells you need actual Player level ups (not the green bar) the permanent (for that world) kind. I don't think a stat system would really work in this game, however every level up gives you more maximum mana and access to higher tier spells like conjuring water (water block) or rain, You gain exp like normal by fighting mobs. I just feel like there's really nothing as FUN as this in game, and games are meant to be fun right? Also I mean for this to be in the main game itself not a mod pack, if it's in a mod pack what's the point? That's not fun, having it in the main game would be.