What are the 19 Avatars of Lord Shiva mentioned in Shiva Purana?

The Shiva Purana (Shatarudra Samhita, Chapter 4) lists the 19 major Avatars of Lord Shiva, each incarnated for a specific cosmic purpose: 1. Mahakala — the first avatar, presiding over time and destruction. 2. Tara — appearing to grant knowledge. 3. Bhuvaneshvar — the ruler of the universe. 4. Shodasha — the 16-faced form. 5. Bhairava — fierce form for destruction of evil. 6. Chhinnamastaka — the self-decapitated form symbolizing renunciation. 7. Dhumavan — the smoky form. 8. Baglamukhi — paralyzing enemies. 9. Matangi — granting arts and learning. 10. Kamala — bestowing wealth. 11. Durvasa — the fierce sage who cursed and blessed. 12. Hanuman — son of Vayu and devotee of Rama. 13. Vrishabha — bull form. 14. Pippalada — the sage who composed Prashna Upanishad. 15. Vaishyanath — restoring the merchant caste. 16. Dvijeshvara — the twice-born lord. 17. Hamsa — the swan form. 18. Yatinatha — lord of ascetics. 19. Krishna Darshan — granting darshan of Krishna. Additional lesser-known avatars include Ashwatthama, Sharabha, Grihapati, Kankala, and others. Each avatar has a unique story, mantras, and devotional practices.