Underdew Nightmare by Miscneilleaneous on DeviantArt

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Reference Sheet: Ephialtes by WishingStarInAJar on DeviantArt

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Sans AUs] Nightmare can shapeshift?.. [Bad Sanses Skit] [AU] [Read Desc For Wholesome Headcanons]

nightmare angel ink and demon dream error sans by DC1009zxt on DeviantArt

WishingStarInAJar ✨🫙 on X: Remember this guy, my Nightmare Ephialtes? @PudgyChee asked what he looks like when he is severely weakened. Welp, like this! An angry cloud made of black smoke