Nurglings' cover save is at +1. They do not block line of sight to anything behind them.
Template, Ordnance and Blast marker weapons inflict two wounds instead of one on nurglings.
Nurglings may never hold table quarters or objectives
The Daemon has a 5+ invulnerable save.
Any time a Daemon unit takes a Morale check the unit suffers one wound for each point they failed the Morale check by.
A daemon unit of 7 or 14 models may recieve a +1 on the summoning dice.