Acw is a lumpy matte predominalty cyan sedimentary rock with dark purple streaks and small glints of blue. Acw's properties are entirly mundane and is uniquly useful an alchemical reagent. Acw was first discovered by the historian Vúnvér Yākīó̄ 'Ivy Mystioned' Cō̋mp̪f̄ Dāsh Yoītḩlās Yoī Joī̄̄̌ within the Qe Kayu̹ Brushlands durring the early 17th century in winter of the year 1609.