The Gates of Heaven. The Dreaming King Saga, #4

The ancient sleeping wizard has finally wakened. The prophesied day of evil is at hand. On midwinter's night in Dendalen, each king must climb the treacherous path to the Tower of Dreams, where he will receive a prophetic dream to help him guide his nation through the year to come. This midwinter's night, it is Prince Karlis who has the prophetic dream, marking him as the new king of Dendalen. Becoming king is no easy privilege, however.
He must reach an area warped by poisonous, reality-changing magic, known as the Forbidden, in time to stop his enemies from shattering the Gates of Heaven and destroying the world. But it may already be too late. The sleeping wizard trapped in the Forbidden to prevent him from destroying the gates of heaven has wakened, tipping the balance irrevocably in the enemy's favor. On every front, from those left at home to face seeded rebellion, to the alliance of those who stand against the destruction and evil waiting to be unleashed, to the unstoppable Holy Warrior Kala and the other soldiers of the Dendalen army spearheading the attacks against the deadly wizards at the root of the war, there is little hope.
The only hope remaining is in the tenuous thread of prophecy.a prophecy that promises no victory, only a thin thread of possibility. Join the heroes of Dendalen as they try to bring their war against the wizards to an end.or die trying. The conclusion in the Dreaming King Saga:The Tower of DreamsAn Uncivil WarBlack MesaThe Gates of Heaven (this book)