Starfinder: Sobek
There are those who believe that the Sobek creature is the physical avatar of an ancient, all but forgotten god of the same name. The god was supposed to have the body of a humanoid with the head of a crocodile, and was worshipped in the ancient times, but has long since fallen out of favor.
The creature bearing the name of the ancient god appears as a fifty-foot tall bipedal crocodile. It stands on two legs, using its huge tail as a balance to keep it standing. The flesh of the monstrous crocodile is always a green-tinged tan, and the scales are so heavy they can regularly withstand massive amounts of physical damage before injuring the monster.
Considering how difficult it is to actually hit the monster, what makes it worse is the creature can regenerate from all types of attacks except for acid. The only saving grace is that once the monster has been reduced to zero or less hit points, it cannot regenerate.
It has been discovered that the beast only appears when it has a specific task in mind. This could be anything from simply crossing a river, destroying a natural (or man-made) barrier or object, hunting down and eating a specific animal, monster or even humanoid, or even searching for lost treasure.
If the Sobek is destroyed before it can complete its task, the body will quickly rot away in less than an hour, leaving nothing but a pile of mud in its wake. The problem with destroying the Sobek is that it will return to attempt to finish the task it originally set out to accomplish. In exactly 31 days, the monster will re-appear where it was first discovered and will once again attempt to accomplish its task.
Generally if it is left alone, the monster will set out to finish whatever its mysterious task is, and will not bother anyone or anything – unless they happen to be the task it was set out to deal with, or if they get in its way. Once it manages to complete its mysterious task, the creature will disappear; the only evidence of it having been on the prime material plane is a wake of destruction (if it was attacked) or massive footprints.
Of course if it is attacked, the creature will retaliate in kind. Engaging in combat with one of these monsters is risky at best, as it has a plethora of natural attacks it can use every round, and it can even pick up and throw objects at tormentors who might think they are out of the monsters reach.
The Sobek can be communicated with, although it is not all that much more intelligent than a typical animal. If a means of communication can be established, the creature can occasionally be persuaded into revealing what its current task is. Sometimes it is mundane and an agreement can be reached, meaning the Sobek will finish what it has set out to finish and leave without any undo harm or destruction.
Other times…. Not so much.
Chris Van Deelen is the creator and contributor to over half of the Wisdom from the Wastelands series, contributor to the Swords of Kos: Hekaton anthology. He also wrote Creatures of the Tropical Wastelands, and 100 Oddities found in a Car. As prolific as he is, Chris Van Deelen continues to write and produce material which will be in publication soon. Not only is he a prolific content creator, he also has a wide selection of fiction and stories! If you like his work, please follow his personal author page on Facebook and on Twitter to keep up with his latest news and game content.