Balance difficulty with a numeric curve, not adjectives

The prompt

Instead of asking for "harder enemies," give the model a numeric curve: "Enemy HP should scale as base_hp * (1.15 ^ level)." Ask it to generate stats for levels 1-10 using that formula.

Expected result

A table of concrete enemy stats per level that follow the exact exponential curve you specified, instead of vague "tougher" descriptions.

Why it works

Models apply an explicit formula across a range far more reliably than they interpret subjective difficulty language.