Rogue's Gallery
Asajj Ventress and Durge are searching a large spacecraft on which Darth Tyranus has told them he senses some presence. They enter a hall filled with many trophies of battle, and approach one another from opposite directions, having split-up and secured any exits from the hall.
Durge is attacked by a deadly combination of baleful life and advanced technology he later learns is named Grievous. Ventress joins the battle but she too is eventually bested by this new monster. Returning to his mentor Tyranus with the pair of battered bodies, he is told he has passed his test, and is ordered to put Durge and Ventress in bacta tanks to allow them to heal.
Read more about this topic: Star Wars: Clone War Adventures, Story, Star Wars: Clone Wars Adventures Volume 3