Note: This procedure involves editing a game file; create a backup before proceeding. Use a text editor to edit the "rtkrondor.ini" file in the game directory and add the following lines:
Load the game and press ALT + C when the final navigation screen appears. The console prompt with a green dollar sign will appear. Type pyromania followed by ENTER. Press ALT + C again to close the console prompt. Mages now know cast any spell without cost.