The Plane of Mountains and Seas is an unnamed plane featured in the Global Series: Jiang Yanggu & Mu Yanling set. It is inspired by the Chinese Classic of Mountains and Seas, a compilation of mythic geography and myth. It is home to the planeswalkers Jiang Yanggu and Mu Yanling.
The world is characterized by its many mountains, forests, plains, lakes, rivers and oceans. It has a rich flora and fauna.
- The Arrow Bamboo Forest: a forest which a welcoming appearance that hides it’s deadly hostility, it was pacified by the arrival of Jiang Yanggu.
- Cloud Dream Lake: the rainbows seen above the lake are nothing more than the ritual dancing of the Vivid Flying Fishes.
- Mount Zhaoyao: represented in Timber Gorge (Global Series: Jiang Yanggu & Mu Yanling), it's a forest of stones that reaches the clouds and a land of wondrous treasures and strange animals.
- Ten Wizards Mountain
- The Northern Mountains: deep in this mountain range, linger the Earth-Origin Yaks, who channel the power of the earth.
- The Dark Sea of Penglai in the north.
- The Easternmost Valley, the first place Yanggu can remember
- The Western Seas: near them lies Mount Zhaoyao.
- The Eternal Divided Realm in the south.
- Mu Yanling's village (ruined by a deluge)
- Village of the Jiuli Clan, Yanggu's foster clan
- Chiyou, teenage Jiuli-clan fire dancer
- Jiang Yanggu, a teenage orphan who journeyed to find a legendary elixir to save his village from a waterborne plague
- Li Shan, nomad and foster father of Yanling, presumed dead
- Mu Yanling, a water mage orphaned by a deluge, seeking to study time magic to undo her foster father's death
- Mowu, Jiang Yanggu's sapient dog
- Yinglong, the Ancestor Dragon
While the "Plane of Mountains and Seas" was coined as such on this wiki, it entered canon when it was mentioned in Greg Weisman's 2019 novel War of the Spark: Ravnica (page 172).