100% of the damage absorbed by [Power Word: Shield] is reflected back to the attacker (for everyone and not just the caster).
[Corpse Explosion] will now explode every corpse in a 40 yard radius around the caster, each explosion will damage all enemies in a 10 yard radius like before and the damage dealt by each explosion is increased by an additional 30% for each of the corpses exploded by the spell.
[Death and Decay] will now have its radius increased to 40 yards (from 10 yards).
For those who have done the battle for Light's Hope Chapel (dk quest chain)
Instead of 10 pleb ghouls Army of the Dead summons an army such as the one summoned by Darion during the battle for Light's Hope Chapel