Ravana was the biggest devotee of Lord Shiva.

Ravana was the biggest devotee of Lord Shiva. Then why didn't lord Shiva help him in the war? Ravana was never a devotee of Lord Shiva. He always worshiped Lord Brahma for getting boons. According to Valmiki Ramayan, Lord Shiva pressing Mount Kailash on his toes and Ravana getting struck is not present. Ravana getting Chandrahas sword from Lord Shiva is also not present. Lord Shiva never supported any evil deeds of Ravana. Infact he congratulated Rama for accomplishing the task of eliminating Ravana. These were the words of Lord Shiva to Rama: "O lotus-eyed, long-armed, broad-chested, annihilator of enemies and excellent among those upholding the cause of virtue! Thank heaven! You accomplished this task." "Fortunately has the fear born of Ravana - which increased the severe darkness on the entire world has been removed by you, on the battle-field, O Rama!" [1] On the other hand, Lord Shiva never fails to protects his devotees who follows the path of Dharma. When Yama tried to take the life of Markandeya who was very young, Lord Shiva came out of Shiva Linga and killed Yama for troubling Markandeya. Later on request of gods, Yama’s life was restored.