What's more terrifying: a hydra, or a hydra made of a viscous liquid where you see your fellow people sliding through the transparent throats?
...yeah, I thought so...
Here's the result from the polls! Hydra and Liquid pred were tied, so...tie breaker! I spent a lot of time messing with the liquid material, and it was quite fun. I never got it exactly where I wanted it, but I still think the end result came out super cool.
4K below
UPDATE: added clothed version! I also played with the liquid material a little bit just to see how it'd look.