Create a dreamlike and enchanting YouTube thumbnail for a 'Fantasy Christmas Song' without featuring a singer. The scene includes a serene and magical winter setting with a glowing snow-covered forest, twinkling fairy lights, and a full moon illuminating the landscape. Snow gently falls, and a beautifully decorated Christmas tree stands in the foreground. Musical notes and sparkling effects fill the air, creating a sense of harmony and wonder. The overall composition should exude serenity, magic, and the essence of Christmas.