When it was my turn to be the Dungeon Master, I began writing a scenario and I got to thinking about this problem. A powerful mage could bring down the city walls and decimate an army, but then had to go and have a rest to learn more spells.
If you are wondering where I get my ideas from, the short answer is ‘everywhere’. We don’t have space for a long answer, but ideas can come from many different places. Each of my novels was inspired by a different event. In this article, I’ll tell you where the specific ideas that led to Soulkeepers came from.