Tower of Rubble

Achievement rewarded when the following objects are destroyed:
 * 100 Aquaas Extractors
 * 100 Grellok Spires
 * 100 Jurnagg Portal

Tactics

 * Grellok Spires (8) are in second level Raga Transmission Room
 * Jurnagg Portals (3) are found middle of the lowest level, the Three Towers Spires, in the Exetron
 * Aquaas Extractors (2) are found in Raga Evala Spire in the lowest level