Question: where are the coals in dark souls 3?
Answer: Farron Coal. Infusion Effect: Heavy, Poison and Sharp. Location: Go to Road of Sacrifices. ... 
Giant's Coal. Infusion Effect: Chaos, Lightning and Simple. Location: Go to Irithyll. ... 
Profaned Coal. Infusion: Blood, Dark and Hollow. Location: Go to Irithyll Dungeon. ... 
Sage's Coal. Infusion: Crystal, Blessed and Deep.