How to play One for Sorrow

About One for Sorrow, from BoardGameGeek:

In One for Sorrow, you are one of the ancient Cunning Folk, guardians of the Magpies and protectors of the forest. An ancient threat has returned-the Spectre of Sorrows, a demonic hunter consumed by hatred for magpies. Long ago, the magpies defied the Spectre, stealing a precious, shiny artefact it once held dear. Now, the Spectre relentlessly seeks vengeance, cursing the forest and destroying nests as it hunts. Your mission is to align the magpies in perfect order, harnessing their power to banish the Spectre and defend the forest. But beware-the Spectre's wrath spreads with every move, bringing ruin closer. If the forest falls, all is lost. Will you guide the magpies to triumph over the Spectre of Sorrows, or will its relentless fury spell the end of the forest? -description from the designer