Dream Manipulation – The ability to manipulate the dream dimension.
Doctor Destiny (DC) is a supervillain with this power (DC Who’s Who V1 #6).
Dream (Vertigo) rules a dream dimension but respects the boundaries between the waking and dreaming world unlike Nightmare.
Nightmare (Marvel) wants to extend his dream dimension to the waking world (Official Handbook of the Marvel Universe V1 #8).
Count Nefaria aka Dream Maker (Marvel) uses a nightmare machine to cause Iron Man to dream he is fighting many of his enemies in Tales of Suspense V1 #67.
Nightmask (Marvel) is a superhero with this power (Marvel Legacy The 80’s Handbook #1).
Baku ((獏) – The Sandman-The Dream Hunters #1 (Vertigo)
Betty Clawman (DC) – New Guardians
Clarence Mack – Rising Stars #5 (Top Cow)
Dreamweaver – TSR 2166 Monstrous Compendium Annual Volume 3
Ennui Dream Spawn – TSR 2166 Monstrous Compendium Annual Volume 3
Orafaun – Creature Collection I
Tales of Suspense V1 #22
Tales to Astonish V1 #26
Tales to Astonish V1 #37
Tales to Astonish V1 #50
Trading Card Games have a surprising number of cards dealing with dreams.
Dream Speaker Mage
Dreams of Lore
Dreams of the Past
Dreams of the Sphinx
Dreams of Wonder
It Was Only a Dream
Keeper of the Dreams
Sailor Moon Location Dream Realm
Tamnnis the Dreamer
Next Dream Mimicry