Kingdom building system : my system has a bug

I was a prodigy in My past Life. I have written Many thesis and Research Papers on Engineering, Physics and Chemistry for which I have won gold Medals. One day While I was playing Pubg I fell asleep and was transmigrated to a new world. And guess what just like Other MC I have my mana heart which is the source of Mana Crippled by my Father who is a King and was exiled into a remote place.
Yeah I received a system but It is non-functional and was only able to see the other talents and that's it.
As I gave up and thinking about Alchemy , I received as a System which functions quite well.
What!! My mana heart is Recovered.
And Top of that I can extract Mana from dying creatures.
I gain levels as I kill!!!
Simply Wowww!!!!!!
As I checked the inventory I was like
WTF!!!!
Grenades , Land mines and Missiles that too in millions in number and the number grows .

I can Copy one talent as long as I kill the Creature and What's more If I copy one or more same talent they can fuse.

This system is surely overpowered and pretty sure It has a bug.