Spilateras are huge monstrosities that resemble multi-horned bears with a long, snake-like proboscis that launches from their mouths. Typically, the spilatera traps its prey by burrowing a hole into the earth or into the side of a rocky cliff. It then waits in the dark, using its camouflage to appear as the cave entrance. When a creature approaches, it attacks, using its proboscis to paralyze the creature. Then its claws to rend it to shreds. From there, the spilatera recedes into the darkness of its cave where it swiftly devours its victim. Often, inedible items such as armor, weapons, and even treasure are found strewn about the spilatera's cave.
Spilateras are commonly found in the foothills surrounding the southern side of the Basilisk's Spine Mountain, particularly in the forests of the western Summer Land. Recently, spilateras have migrated over the mountains and through the Elegant Valley into the Wallingmiotta and even Gar Wabrizz. The centaur clans east of the Wallingmiotta have had a great deal of difficulty dealing with the invasive predator as it has started killing off the megafauna south of the Fairknot river.