The Ink Treasure of Wu Daozi, (Daozi mobao, 道子墨寶) is a collection of fifty ink drawings of the Daoist pantheon attributed to the noted 8th-century artist Wu Daozi but likely produced during the 13th-century. The collection ranges from the Jade Emperor to heavenly generals and bureaucrats to lowly demon soldiers. For example, see Marshal Tianpeng, a wrathful esoteric Daoist deity (the image has been enhanced). Click the link below for a PDF.
https://journeytothewestresearch.files.wordpress.com/2020/12/e98193e5ad90e5a2a8e5ae9d.e59bbee5868c.e4ba94e58d81e9a1b5.e5ae8b.e7bab8e69cace799bde68f8f.e7be8ee59bbde5858be9878ce5a4abe585b0e7be8ee69cafe9a686e8978f.pdf