A stone column, also known as a Portal Stone, is a stationary item. Channelers of sufficient level can use these stones to travel to another stone in a random location.
Attempting to channel any weave while holding the source will transport the channeler, their mount and any player or mob following them to another portal stone at random.
This can force the channeler into the Overchannel status, and can still the channeler severing their connection to the source permanently.
The channeler will have 10 seconds of lag after being transported to the new location.