If you compare this with the BGII Imp entry, it has completely changed. We are looking at the sources instead of the BGII listing and putting the result in BG4 form. Note that Spirits are ranked, all attacks have dice, Target Number, damage, and range listed clearly. All Attributes are clearly listed, with damage boxes. Weaknesses are things that particularly harm the creature - doing double damage, or having twice the effect. Vulnerabilities are things that the creature is vulnerable to - such as blessed or silver weapons. The remarks give a full overview of the creature, explaining things in some detail.