At the North pole, things were down to the wire, as Christmas night was upon them, and they still had a lot of work to do before Santa could take off and do his runsthat night.
Jolly Old Saint Nick looked to his head elf. "Alright, what's the latest news?"
"Well sir, we've got all the nice toys ready to go, we just need to load all the lumps of coal," said an Elf, looking over a list. "Oh, and we've got reports of an alien invasion planned to begin tonight to capture children and use their dream energy to power their armada."
Santa sighed. "Again?" he asked, clearly used to Christmas. "Is there time for me to go deal with that?" he asked.
"No sir, you're set to leave in about two hours, and you're still needed to supervise things here." explained the Elf.
The jolly one scratched his beard carefully, thinking. "Alright then, bring me the Nice List," he requested, a long list being brought to him. He looked through the list, checking it twice. "Lets see, the Tate twins from New York, Eiji Takeo of Japan, ah, the Antonimous Twins have been very good this year..." he said, a nearby Elf taking down the names. "Kaylee Torr of Phoenix Arizona...Benny Smith of New Jersey...ah, Eliot Nadel, he's been a very good boy sense I gave him that robotic hand for Christmas," he finished. "Alright, those kids should be enough to handle the aliens once I've made them Dream Warriors!" he said. He made a note appear in his hand and wrote a letter, multiplying it to one for each kid, signing them. "And a little Christmas magic," he said, reaching into his bag and pulling out a hand full of magic dust, blowing it on the letters.
"Alright, let's send them out!" said Santa, snapping his fingers, calling Rudolph in. "Alright, Rudolph, hurry and deliever these letters, there's no time to waste!" he said, the little reindeer taking off and flying off. "Alright everyone! Back on schedual.
And so Rudolph flew around the world, delievering the letters in person, and they said:
"Dear [Insert Character's name here];
Aliens are about to invade the Earth to kidnap all children to use their imaginations as a fuel source. Now I love children, but being this is Christmas night, I don't have time to deal with this myself, so I'm giving the children with the purest imaginations the power to become what are called Dream Warriors, the guardians of the Dream Realm, an alternate universe were the dreams of our world are a reality. You will gain great powers, including one of your own wishes, as well as an ally from the Dream Realm to aid you in the coming battle. Fight well! I'll come help the moment I can! And remember, be good kids!
P.S. Wait five minutes, then imagine the power and dream ally you won't, after wish is made, this letter will distingrate.