Tau Ceti IV

Tau Ceti IV is the fourth planet of the Tau Ceti planetary star system.

Location
Tau Ceti IV is only 12 light-years from the Solar System. On a cosmic scale, it is very close to Earth.

History
In the distant future, Humans traveled to the stars and began to establish colonies in nearby star systems. It took decades to colonize Tau Ceti IV, but a few years after the planet was successfully terraformed, they emerged as the Dimensional Beings. They came through interdimensional portals that opened on the planet's surface or at low altitudes. They made a real hell for the unsuspecting and not ready to attack the colonists. If not for a heavy armored cruiser equipped with heavy laser batteries, which was passing by to regroup, the planet would have fallen. The portals closed pretty quickly, and the monsters had nowhere to retreat, so in the end they were interrupted... After that, the invasions of the creatures were not so numerous and rather rare once every few years.