Hello, I've been stuck here since yesterday. I don't understand where the tower is to look for information about the summoning.
Hello! Thanks for playing!
The lich's tower is back by the orc camp, you take the right tunnel into the cave.
This walkthrough might help you as well:
https://docs.google.com/document/d/1V7YYRhsm1RNUEMyrHCS6UuiMoveJL38KBMha46xWxOQ/...
Goodluck!