So, there is that thing in the game that you can rent. I checked the guide and it seems that you can get them in many locations and it seems that I can't find it in any of the location the game mentioned.

Could you please guys tell me from where can I get relics other than renting it and waste my points on it. Also, what is stack that was mention in the guide is it applicable to the relics that you rented or only to the one that you own.

Appreciate your help guys.

you can find it in town 

where in town? if you mean the that you rent then I am aware of that. What I don't know is how can I have one permently so I can upgrade it.

here is the link for the guide:

https://forum.world.blackdesertm.com/GameGuide/Detail?boardNo=16&contentNo=18

If I'm not wrong you can drop it from boss

You can rent one from a dude in the starting town. He is some old guy, if you tap on list on the top left he is the dude with the gem looking icon, you can just tap on his name and it will auto path you to him.