Grim Reaper

Grim Reaper is a Undead Reaper boss that was brought up from Hell to work for Jolly Roger. But Grim Reaper brought up undead enemies and Jolly Roger didn't like that this was he was doing this. He banished him to Tormenta. He left the island on the Diablo. He's the summoneer of the ship. In other words he brought undead souls to work on the ship. He is a powerful boss. He's lv 59 to be close to lv 60.

Loot
He only drops his most powerful ability if you can defeat him, the power to bring back the dead. Nobody has defeated him.

Locations Seen...
He is only on the Diablo, ghost ship, looking for undead souls to take to the other side. The only reason he aboard to bring the souls to the other side.