NPC trigger "Areaspawner" attacks player when dragging corpses in Sleeper's Tomb
 

Approximately loc -610 443.86 3.75

[Mon Oct 05 19:30:22 2015] Summoning Hokushin's corpse...
[Mon Oct 05 19:30:23 2015] Areaspawner tries to hit YOU, but misses!
[Mon Oct 05 19:30:28 2015] Areaspawner tries to hit YOU, but YOUR magical skin absorbs the blow!

Fixed by Alunova, pending update