What to do with scrolls (Portal Knights)

Scrolls put in a quick slot and study, thereby learning a new craft. The ball is so fun.

An-u
Where to find the portals in the snowy worlds (where there is no pecher)? And then do not hunting.

And how to defeat electro-Cervia?

To find the portals, use the compass. And about hard bosses, here's a video

An-u
thank you