Sure thing. Monsters tend to show up when the conditions suit them—weather, time of day, and the mood of the land. Track a few variables: the temperature, the phase of the moon, the recent battle activity, and the local lore. Then look for patterns in your data. If a creature has appeared after a storm on a full moon, that’s a clue. Once you see a repeatable pattern, you can predict the next spawn like a weather report. Keep it simple and keep your eyes open when you roll out the sheet.