I have an easy time of it myself because in real life I make stories that I base characters off of myself (even if there is nothing about them that is anything like me they are still me in my mind) One of my characters has been in developement for at least 10 years and has so many powers. I just think of myself in dreams as having the powers of my characters. To materialize a weapon I know that my main character that I just talked about has many weapons in a dematerialized state that he can summon at any time and then dematerialize them again. Any weapons that that character has I automatically have in my dreams. They arent physically on my body but they are a part of me kinda because my character made it a part of himself. and 10 years means I have a ton of stuff I cant even remember everything that he has but most things I think of I probably have it.