Reavers are hybrid Necromancer/Fighters with chain armor and a variety of Albion weapon skills. They are the fighting class that protects Arawn, lord of the underworld. Reavers are hybrid caster/tanks, related in spirit more to the Thane and Champion than the Paladin. They have some debuffs, like the Champion, and some direct damage/lifetap, like the Thane. They also can specialize in a variety of melee skills including all the one handed weapon specs, shields, and parry. Their spells are a variety of debuffs and lifedrains which are intended to augment their damage in combat.
Reavers can specialize in flexible weapons, which include whips, flails, morningstars, chains, and the like. The flexible weapons have different damage types for the different types of flexible weapons. For example: chains are crushing, whips slashing, etc.
The Reaver has a "proccing" life drain duration buff. This buff, when active, gives a chance to heal the Reaver while he damages his enemies.