Monstrous caroling

How do you get a group of monsters to go caroling? It is actually rather simple: simply promise that after the last house, they can go pillaging.
And so the little village of Snell found themselves visited by a group of monsters. The villagers cowered in their homes as the silence of the night was shattered by screeches and snarls, wails and cries, roars and chatters.
From house to house the monsters went, led by a little imp. Nothing in the village was touched by the monsters as they worked their way to every house. No villager dared to peek outside to see the careful arrangement of the monsters as they shrieked familiar carols completely off key.
Then at last, the monsters arrived at the last house.
It was a small, shabby abode. Only a few days ago it had been vacant. The monsters knew nothing of the man who had moved into this shack except for the fact that he was human.
The monsters began the first song. Halfway through it, the cracked wooden door creaked open, the hinges protesting at the movement. The monsters were startled, but the imp encouraged them to finish their carols. Only after they were done, would these monsters be allowed their rampage.
The man leaned on a worn wooden staff, one hand resting upon the crystal that rested within the top of the staff. The man appeared nearly as weary at the shack he had claimed as home. The simple robe he wore was faded and torn, his graying hair straggly and thin. Tired brown eyes watched the monsters at his door without fear. Instead he regarded them with bemusement, as if the man was struggling to comprehend why such an odd collection of monsters would be causing such ruckus at his door.
Finally, the monsters came to the end of the last song. As the last not faded into the night, the man slowly clapped.
"An excellent attempt at spreading some holiday cheer, but I am afraid monsters are not welcomed at my door." Straightening as a mauve wolf released a growl, the man gave a cough. "I would merely send you away, but monsters do have a tendency for destruction."
The wolf shot forward. Shouting, the man held out his staff.
A harsh ray flew from the crystal, encompassing every monster within a silver glow. The man banged his staff against the ground twice, and the monsters were brought together as the glow began to shrink.
The monsters shrank, smaller and smaller. Then the silver glow brightened into a blinding light that flashed once before disappearing.
Leaning against his staff again, the man limped out into the snow and picked up a snowglobe that had appeared where the monsters had been.
Looking at the scene of caroling monsters, the man gave the snowglobe a shake as he headed back into his home.