Add custom objects using the hierarchy

Hi, pretty simple I need to set up a lot of levels for my game, like a lot of level, and i need to do it quickly, and there are some objects that need to be added to each level (scene), so is there a way for me to add an option in the hierarchy to quickly add the objects that i need, just so that i don't have to always go into every scene and have to Right-Click, Create empty, add my scripts to the object, then modify the parameters off the script

i want to just go, Right-click in the hierarchy, Add my predefined-object and that's it

before you say, i can't use prefabs for...... reasons.

I remember there was an attribute but i can't find it anywhere.