These symbols are used to represent Warlocks and Seers. A single diamond with no adornment represents a Warlock Engineer. A stem is added for a Warlock Champion. A stem and a single scratch mark signify a Warlock Master, while a stem with two scratch marks is the basis for a Grey Seer's blazon. Individual Warlocks and Seers generally add additional adornments to these basis shapes. Note, however, that Warlocks and Seers never use a "horn" on their runes, as would be the case with a Vermin Lord's runic symbol, or "V". The Grey Seer's symbol represents the sound of the letter "G". The other symbols do not appear to have sounds associated with them. See Skaven army book, page 69 far right, page 70 far left, Grey Seer's cloak on book cover.