"Tusk Riders are the offspring of Trolls and Men who allied
together during the
Borderlands and Beyond p46.
An evolutionary chart depicting the appearance of Tusk Riders in the Lesser Darkness.
Uz Lore p50.
"The actual origins of the tusk riders are unclear, though it is
known they first
appeared during the Second Age."
Gloranthan Bestiary: p43
"Aram-ya-Udram was a human, one of the original Founders of the
Empire of the Wyrm's Friends. During the Long Night, before the Empire, he captured
and fettered a black demon in Dragon's Pass, the Centre of the World."
Elder Races Book p99
"Later after Aram's death, during the Second Council, [the Tusk
Riders] turn to worship
the darkness demon guardian of their temple, and become the "halftrolls" of later times."
History of the Heortling Peoples p5
Five sources and five answers!
Personally I think the Tusk Riders have alternated between human and halftroll in various degrees at various times.
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