Summoning Room

From the Introduction

Somewhere high above the ground lies this foreboding summoning room. The narrow arrow slit windows let little light in and do a bad job at keeping the cold howling wind out. The rooms only exit is a steel reinforced wooden door, but its dominating features are a large brazier on a raised platform at the back of the room, its flames rising high, and a large summoning circle in a sunk section of the floor which takes up most of the room. The summoning circle blazes in a downright infernal light and the heat it emits distorts the air.