Spectral Researcher

Spectral Researchers were wraiths found in Scholomance.

Drops

 * Formula: Enchant Weapon - Lifestealing
 * Wildheart Belt

Tactics
These mobs engage in moderately strong melee damage, and are able to temporarily render themselves invulnerable and then fully heal themselves at a cost of around 1,000 mana. Ideally they should be crowd controlled (via either Shackle or Freezing Trap) until the rest of the mobs in their group are dead, at which point they should be killed with maximum speed in order to prevent them from self-healing.