Jizz

Frankenstein's Monster Mask - Elmer Batters

OldenPorn

[LUCHA UNDERGROUND SPOILERS] The monster Matanza Cueto has the most terrifying mask I've ever seen in wrestling

SquaredCircle

Way around the Mask (F Human -> F Tentacle Monster/Beast) by shigenobanai

transformation

Slutty Mask

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[Weddings/Masked/TGTF/Monster Girl] Two Lives Linked in Love by UsaRitsu

Inanimate_TFs

Swamp Protector [M Human -> F Multi-Breasted Beast/Monster; Corruption, Mask] - Maddworld

transformation

[Suiting/Anthro/TGTF] Monster Gal Mask by Tranzmute

Inanimate_TFs

[Masking/Monster Girl] From Beyond by Hukeng

Inanimate_TFs