Who Were The Mound Builders?

Who Were The Mound Builders? a song by Lazer/Wulf on Strah

Choose Again (Right Path) by Lazer/Wulf ,
Lagarto by Lazer/Wulf ,
(A Conflict of Memory) by Lazer/Wulf ,
Twelve Leaps Over The Triple Trap by Lazer/Wulf ,
Beast Reality (Center Piece) by Lazer/Wulf ,
Concentric Eyes by Lazer/Wulf ,
Choose Again (Left Path) by Lazer/Wulf ,
Who Were The Mound Builders? by Lazer/Wulf ,
Mutual End by Lazer/Wulf ,