How should GM intrusions be paced throughout a Numenera game?
My players are currently finishing up the Shadewalker adventure. Each PC can earn up to 4 XP based on what they accomplish in the adventure.
However, PCs also gain XP based on GM intrusions. Intrusions are one of the main tools for the GM to participate in the story. How should I be pacing GM intrusions? I'm worried that if I use too many, players will accrue too much XP and some of the challenges will become too easy. Sure I could adjust their difficulty, but I'd rather avoid the problem if possible.