Skraelos is a character in Might and Magic IX. He is the God of Death, and decides who gets to enter Hallenhalt. The worthy will stay in Hallenhalt until Krohn needs his army.
When the Saviours of Chedian lost their army to Tamur Leng's horde, they travelled to Arslegard to talk to Skraelos. He was willing to return their army if they show penance for their sins.
Skraelos can be found in the Hall of the Gods. He gives the party the Light the Six Fires of Penance quest, which must be completed to return the party and their army to life.