LEGO [Hero Factory] - ROCKA Crawler Building Set - Invasion From Below Series (44023)Power into the underworld with the LEGO [Hero Factory] ROCKA Crawler! Heroes and citizens have been captured by the beasts and are being held deep beneath the streets of Antropolis City. Slip into action with the massive Crawler, using its giant machine arms to climb obstacles and chainsaw hands to slice through rock. Investigate the mysterious cocoon to collect vital data, but bewarea menacing jumper can hatch at any moment, requiring quick reflexes