The warlock and the unicorn

"An angry warlock has doomed the people of Flanders to an eternal winter. The only way he will reverse the unending snow and cold is via the gift of a silver unicorn. The problem? No one has ever seen one. Do they even exist? You must decide: do you leave your village to battle the warlock on your own or do you go in search of a silver unicorn?"--Provided by publisher.