In WAH 2.0, units in mercenary camp are stronger than other units but with limited amount and long charge time. So players would rush to purchase them to get benefits.
There are 3 standard and 2 epic mercenaries. After 4 minutes players can hire first 3 ones, which contain TANK, Healer and DPS type of units. After 7 and 9 mins, the rest 2 epic mercenaries would be unlocked, they are strong and rare.
The first mercenary is Ogre Champion, it is as strong as a T3 unit but can be hired by player in the early stage.