While there is just one way to farm the Nameless Venom in Ark ... the location, head straight to 57.0 Latitude and 84.8 Longitude on the eastern side of the map, and you will find the cave entrance.

Ultimate Mobile Edition map, Ragnarok, offers the same fun you get from other maps as you craft your way to survival.

Obsidian is a shiny black rock found in mountain areas, especially near lava mountains in Ark Lost ... end of the cave. For the next location, head to the central area of the map at 40.5 Latitude ...

You'll find this map at the Tunnel in the Cliffs location in southern Apollonia, where a bunch of bandits seem to have fought ...