By Dream crossing I mean the ability to enter another person's dreams whether to just observe or to maybe to change the dream in different ways.
I also want to know if any consequences like
1:Your mind being tricked making you believe it's real
2:You could actually be hurt by the dream
3:You could get trapped in the dream
4:You could damage your or the other persons mind
Finally, just to point out I am not thinking of manipulating anyone or anything like that I merely think this could be used for fun (by that I mean you and someone else seeing what the other could dream up and maybe have a battle)
I know this sounds very unrealistic, but I have a really big imagination.