Vampire

"The Vampire is a demonic entity with an insatiable lust for blood. The blood that he steals is the only thing that keeps him alive, which makes him a versatile hunter. Those who fight this demon must be wary of his bite, for it can leave you bleeding to death."

The Vampire is a class that has the ability to steal blood from others through either killing or biting. Though under a strict time table before he loses all of this health, he can also help his teammates by unleashing a Feeding Frenzy.

Blood Thirst
Blood Thirst is a debuff that lowers the health of the Vampire as time goes on. Unlike the Butcher's Decay (which minuses the user's health by max health divided by 40), Blood Thirst has a consistent rate of losing health. Which means that it's about hunting down enemies (or health packs) before you lose all of your health. But you also gain health through killing enemies or using bite.

Haste
Haste is an ability that can only be activated when the Vampire's health is lower than (or at) 35. This ability increases the speed of the Vampire until he can get some health. After regaining health (or dying), he will lose this ability.

Bite
Bash is a close range melee special that can deal 35 damage towards a target within a 20 stud radius. You can also use the lock-on feature (by pressing Q over your target) to make sure you can hit your target. If the hit is successful, then you gain back 35 health.

Reload Time: 10 seconds.

Vanish
Vanish is a weaker version of Phantom's Abscond ability. Only able to teleport to any location within a 35 stud radius, this ability can be used to quickly flank a target or get out of a rather sticky situation.

Reload Time: 15 seconds.

Feeding Frenzy
Feeding Frenzy is an ability that gives all of your teammates the ability to gain back health by damaging a target. This ability only lasts for 25 seconds.

Reload Time: 50 seconds.

Trivia

 * None (yet)!