Devouring and Evolving in the Abyss

A tower rises from the glaciers of the far north, reaching straight into the clouds. No one knows how many floors it has, or why it appeared. The world calls it the Abyss Tower. Under its influence, teleportation nodes connected to Abyss Towers of varying levels have appeared across different regions. A handful of them connect to unknown worlds.

Young man, while you gaze into the abyss, it throws a dog head at you and gives you the middle finger.