The Slivener is a twelve-foot-tall giant living deep in the forests of Kazakhstan. It is humanoid, has paper-white human-like skin, and seems to be nocturnal.
Not enough is currently known about the animal's biology to properly classify it. In some respects it is like a great ape, but in others it is more like a frog or the common housefly.
The most remarkable thing about the Slivener is its tongue. At first glance, it seems that the creature has pink, writhing tusks. However, it turns out that this is actually a single organ that protrudes from two facial orifices.
Bafflingly, the enormous snake-like tongue is unattached to the rest of the organism. It is able to slide back and forth between sides of the creature's face, always becoming longer on one side and shorter on the other.
The leading explanation for this is that the tongue is actually a separate, symbiotic animal. If so, we are looking at a truly unique evolutionary partnership.
One must ask: Can the tongue survive independently if removed from the Slivener? And if so, for how long?
Initial experiments aimed at answering these questions have proven... ill-advised. Further research -- and further researchers -- will be required.