One of Dream's visible forms is a mysterious blue butterfly, that reflects the sky.
Another form is a female humanoid with long, straight hair, dressed in a flowing caplet, cut in short points in front, with a tall, wide, elaborate headdress that obscures its eyes.
Magic and Abilities
Dream Magic: Dream is able to make people dream their greatest desires or fortune telling through dreams. It also provides prophecy for its master, showing them the future to come in their sleep.
Fortune Telling: All Clow Cards have the ability to help their users predict the future. Their method of fortune-telling is similar to that of tarot cards. The interpretation of the message the Clow Cards relay depends on the magical power of the user.
In Episode 40, some of the primary characters have dreams that seem to represent their greatest desires. Tomoyo has a dream about being surrounded by millions of Sakura clones in her battle costumes, while Syaoran has a dream of being in an empty cinema where a romance film plays involving him and Sakura hugging on a beach.
After that, it made Sakura had her recurring dream about the Tokyo Tower (from a different perspective, though) while they were there, and to remember all her memories about the capture of the Clow Cards until then.
However, it was stopped by Syaoran using the Time, which made them realize that Sakura had been stepping on the card, this allowed her to catch it and, finally, The Dream went flying to Syaoran.
In Sakura and the Mysterious Fortune, Sakura transformed Dream in her sleep, causing her to have a dream involving Eriol Hiiragizawa, Spinel Sun, and Ruby Moon at Tsukimine Shrine. Dream is under Dark.
- Dreams lack of eyes appears to be based on the concept of the "blind seer", those who can see into the future more clearly due to their lack of physical sight.