Steel: Romance of the Three Kingdoms

Kōtetsu Sangokushi (鋼鉄三国志) is a Japanese anime series loosely based on the 14th-century Chinese literature, Romance of the Three Kingdoms. It was produced by NAS and Konami Digital Entertainment and premiered from April 5 to September 27, 2007 for 25 episodes.

Plot
The Imperial Seal has been passed down through the generations of guardians since ancient times and confers great power unto those it chooses.

This is a dynasty of war, where great armies clash in terrible battles and great heroes carve their names in history. It is also a time of death and destruction, when the people of the land live in constant fear of the sword. Onto this stage steps the reluctant Rikuson Hakugen (Lu Xun), whose family had been the guardians of the Imperial Seal up until it was stolen by Hakufu Sonsaku (Sun Ce), the ruler of the kingdom of Go. At the behest of his mentor, Koumei Shoukatsuryou (Zhuge Liang), Rikuson offers his services to Sonsaku Sonken with the intention of confirming the will of the Imperial Seal. However, assassins strike down Sonsaku and the Imperial Seal is lost. So begins, Rikuson's journey to recover the Imperial Seal and discover his destiny, with the help of his friends.