So I found out that Rulers Mask quite references to Baldwin IV that wears Silver Mask. And the item's description makes it obviously : r/Eldenring
ArtStation - Baldwin IV's mask
Halloween Party Mask Masquerade Horror Darkness Mask Costume Mask Latex Mask Suitable For Men And Women - Temu
baldwin iv cosplay diy｜TikTok Search
Did King Baldwin IV Actually Wear A Mask?
King Baldwin IV, The Leper King Arose to the throne four days after his father died, at the age of 13. The leper king wasn't known for…
Why exactly does King Baldwin in the film Kingdom of Heaven wear that cool mask? - Quora
Ch0pper on X: King Baldwin 4th of Jerusalem had leprosy & the same mask. BO4 Biblical angle for the story? / X
King Baldwin iv, an art card by Ytène Kisters - INPRNT
The Death of King Baldwin IV - The Fire by Roman Lion
Lot #222 - KINGDOM OF HEAVEN (2005) - King Baldwin's (Edward Norton) Face Mask