Markal is a character in Heroes of Might and Magic V and in Clash of Heroes. He's aslo one of antagonist in Heroes of Might and Magic V.
Before Queen Isabel's War
Markal was a devoted servant of Asha and a student of Sandro. When his master died, he made an oath to take revenge. Later, he opposed Ludmilla's tyranny. He was locked in a cage, but Fiona came and rescued him. He helped her in becoming alive once more, by assisting her in defeating Ludmilla and gain the energy for her life.
He was later placed as trusted councilor of Fiona Unicorn, Godric's sister. Little did she know that he made a secret cult, besides his talents as an astrologer. When Fiona died, Godric and Nicolai Griffin accused him of treatchery against the Holy Griffin Empire. Markal was banished, but he took Fiona's skull with him.
During Queen Isabel's War
Markal came to the Holy Griffin Empire when he heared that Nicolai, Queen Isabel's husband, died. To further his plans, he made a pact with the Queen herself, so he had been entrusted to capture Lorekeep and take Amulet of Necromancy from Hikm. However, to raise Nicolai, he needed to destroy the Silver Cities, taking the Staff of the Netherworld, the Cloak of Death's Shadow, and the Ring of the Unrepentant. In so doing, he killed Cyrus, so Godric revolted against him and the Queen. In the end, Godric was captured.
Afterwards, the Markal and the Queen journeyed to the Hall of Heroes. Using the power of the Vampire's Garment, he raised Nicolai, but Isabel was terrified of what she had done - but she did nothing to stop the risen Nicolai from taking command of the Holy Empire (temporarily). However, when Cyrus's son, Zehir, arrived, he freed Godric and joined up with Findan. Together, they defeated and slew Markal once and for all.
However, things turned out to be different - before he died, he bound his soul to the Ring of the Unrepentant. When Zehir came to the site where his father, Cyrus, died, he saw that it was Markal's illusion to kill him. Thankfully, Zehir was able to defeat him, but unfortunately, he did not see any trace of his father.