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A mock up of what I think Jelly Serpent Cookie would be like as a playable character.

Their skill would be to summon the medusa head thing and ride on it while it shoots a lazar three to four times. The lazar will destroy obstacles by petrifying them before they crumble. Another ability of Jelly Serpent is that petrified jellies actually do give points.

I couldn't decide on a pet so I made a few. Emerald Golem is the only one I didn't make. They are a preexisting legendary pet that isn't paired with any cookie. If Jelly Serpent is a legendary cookie, then I think they would fit since medusa has the theme of turning people to stone and this pet is a stone golem The Jelly Snakes are two snakes that were cut off from Jelly Serpent and attached to each other. Tokey was given that nickname by Jelly Serpent who decided to keep it. They have two orange eyes and a pink mouth. I'm also considering just making it a mimic which mimicked one of the tokens. Petrified Amphiptere was turned to emerald decades ago. They can still move around just fine, but will never be able to grow any bigger. They want to protect Jelly Serpent, hasn't communicated why, perhaps they just remind them of someone. Jelly Serpent has tried several times to undo this petrification, but it never worked.

Finally I think their treasure bonus has to be the Naga's Heart

Plus their little icons

Today:

hmmmmmmmmmmm

Humans(cookie) version of pet