Roll a random encounter
Use a random encounter when you know how difficult the fight should be but do not want to choose the opponents yourself. Chucks rolls a roster from its monster data, and your AI turns the result into a scene with a reason for the monsters to be there.
Give it the party and the location
Party composition is required. Difficulty and location are optional, but both make the result more useful at the table.
Roll a moderate random encounter for 4 third-level characters traveling through a swamp. Set the scene and tell me why the monsters are here.Use the situation when terrain changes the fight
Say whether the party is sailing, swimming, underwater, or flying. Chucks uses that information to avoid opponents that cannot reach them.
Roll a high-difficulty random encounter for 5 fifth-level characters traveling downriver on a barge.Roll again
Ask for another roll when the first result does not suit the moment. The same request can produce a different roster without changing the party or encounter budget.
Roll that encounter again. Keep the party, difficulty, and location the same.Random is not the same as original.
Random selection moves beyond your AI's usual favorite monsters, but it cannot know what would feel genuinely unusual in your campaign. When you already have a strange premise in mind, build a custom encounter and describe it directly.