How do I fuse objects (like cubes and cones)? I am making a trident for a fish game where you control the currents to guide fish around. I wasn't thinking ahead and didn't use the extrude tool to add other parts and now I have to connect them. How would I fuse them together? Also, I have to put cones on the ends, so does it matter if it is a cone, a cylinder, a cube, or whatever object it is that you are fusing? Or if it is two different objects? And can you un-fuse them?

I know that this is kind of more than one question crammed into one, but it is all the same idea, right? (I was going to end it with the questions and that last one wasnt very Blender related)
You can join two objects with Ctrl+J:



Make sure that the object you want to have the modifiers for and the origin of the combined object is the last selected and the outline is lighter orange.

To separate again, Tab into edit mode and hit P > loose parts

note from author: Sorry for the terrible trident model. I didn't have motivation to try harder.