From the introduction to the adventure:
“Devil’s Deal” is an AD&D® adventure intended for use with the Warriors of Heaven accessory [TSR #11361]. The adventure is designed for 4–6 good-aligned celestial PCs of levels 3–4. Celestial races include agathi- non, aasimar, archons, asuras, eladrins, guardinals, and quesar. Archon PCs may be lantern or hound archons only. Ideally, the adventuring party should contain a mixture of lawful, chaotic, and neutral PCs.
Rules for creating aasimon, archon, asuras, eladrin, guardinal, and aasimar PCs are pre- sented in the Warriors of Heaven supplement; rules for creating quesar PCs can be down- loaded from the TSR website (www.tsr.com).