[TOMT][animated short][19xx-2000] short clay animation where at the end one grey humanoid with a cone for a face attacks other humanoid

So I don't expect anybody is gonna figure this one out but may as well try, eh?

Years ago, probably pre-2000 I saw this short (2-5, 10m max) clay animation on Polish TV, where one grey humanoid made of clay explores a room or a house and examines different objects, and at the end encounters another humanoid, but when the latter turns around it appears that his face is a beak-like cone covering it's entire face, and then it stabs the first humanoid with said cone, it going all the way through the first creature's head - and that is really the only thing I'm (almost) sure of. I remember the whole thing was rather bleak, didn't have any dialogue, might have had some music but I'm not sure about that, and the closest thing I managed to find were shorts of Jan Švankmajer with Dark, Light, Dark coming the closest to both style and feel of the short I'm looking for, but that's bout it.