General Info and References
Kalam:'...there's not a mage in this world stupid enough to invest power in a valuable object. After all, who'd steal a rock?'(DG, UK MMPB, p.471)
Quick Ben's 'Rocks'
'This (an invested rock) was intended to be used as a last resort'...(Kalam) crouched down before the flat rock, set the stone on it, then found a fist-sized cobble...bringing it (the cobble) crashing down on the (invested) stone...it spattered like wet clay'(DG, UK MMPB, p.471-2)
Effect: Kalam, Minala, Keneb, Selv, Kesen and Vaneb are instantly transported to The Imperial Warren.(DG, UK MMPB, p.472)