A variety of different types of Champions were added in D2X. They receive various bonuses to make them tougher than standard monsters of their type. Most champion monsters spawn in bright colors, making them stand out from standard monsters. Ghostly champions are translucent, and are the only type of Hell Bovine that look any different from all the rest.
Minions are the monsters that spawn around a boss. They share some properties with the boss (such as Extra Fast and Extra Strong), and are tougher than normal monsters. They also receive considerable bonuses to their hit points, compared to standard monsters of their type.
Champions receive hit point bonuses over standard monsters of their type.
Uniques have hit point bonuses over standard monsters of their type.