Servants of the Shadows until the older race left Z'ha'dum , the Drakh became major antagonists late in the " Babylon 5 " series and in its sequel , " Crusade " .
Head entity: babylon 5 Q210146 20 21
Tail entity: crusade Q737343 30
Relation (head \u2192 tail): P155
Inverse relation (tail \u2192 head): P156