Welcome little Dragon!
This is the spring of the River Styx. From here you can explore and add to the ever-shifting currents of the stream.
Any contribution you make has an effect on the overall flow of the story. Both your own and the river as such. Be brave soul and venture forth!
Some believe that there is a straightforward route but the somewhat chaotic and unstable nature of Mana can often lead to surprising results when treating it. As always, caution is advised when handling magical resources of any kind (especially during Beta!)