Slaanesh Chaos God from Warhammer Fantasy 30K 40K

Above is a picture of Slaanesh the Chaos God in the Warhammer series.
We even see a background silhouette in the hit game Total War Warhammer 3

Here is another picture of the Chaos God from the book Malign Portents

This is an interesting looking creature. A God chained by the Eldar.

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