Rift

A Rift is Terth's primary form of invasion on The Ancient World.

Gargantuan tendrils of red flesh rise from the land. They crush anything in their path. The tendrils spew flames, and molten lava seeps from the wounds that Mortals cut into them. Terth's minions guard the rift, and seek out any Mortals nearby.

The only consistent way to defeat a rift is to destroy it's cores, which usually take the form of obsidian spheres.

When a rift is destroyed, it may display one of several behaviours, depending on the climate.
 * In a cold climate, a Rift will petrify, turning to stone.
 * In a normal / warm climate, a Rift will collapse, turning to sand.

Below, you can watch footage of a dead Rift in Blue Peaks.