Grim the Overseer

Overview
 is the boss of Transylvania. He has 1,350,000 HP and spawns every 45 seconds.

When defeated, the player will obtain 950 Experience and 201 - 1001 Vel. There is also a 0.5% chance to obtain either the Destiny's Song, the Divine Platemail, the Faithkeeper, the Soulrender or the Retribution.

Trivia

 * Portions of Grim the Overseer represent the Gamemaster (a.k.a. Akihiko Kayaba) from the "Sword Art Online" anime series.
 * The weapon held by this boss resembles the Bone Reaper, recolored in a black and red fashion.
 * Grim the Overseer is the only boss that does not offer a shield as a drop.
 * Outrunning this boss is difficult, as its speed surpasses a player's walkspeed.
 * Grim the Overseer is the first boss ever to drop legendary items that all have a 0.5% chance of dropping.
 * Grim the Overseer is the boss that respawns the fastest and it makes it easier to farm legendaries.