C232 Long Yue's Art Yellow Emperor
The Titan Clan was a powerful race in the universe. Every single Titan was hundreds of meters tall and extremely terrifying. Mu Qing being able to transform into a five meter tall giant was definitely related to the Blood Lineage Arts of Titan Clan.
Fortunately, this change was not permanent. Mu Qing could shrink his body at any time, and like the Small Black Fish