Clay is a natural resource used as a reagent for inkmilling and crafting blademaster swords. The various types of clay include:
- Black clay is found in the Mannaseh Swamp.
- Gold clay is found underwater in the Pachacacha River.
- Red clay is found in the Zaphar River.
For the less adventurous, Jingo sells an entire cache of reagents in his shop just north of Vinci in Delos. Red clay occasionally contains gold flakes.