Like Ronseal... exactly what is says on the tin.
Post any questions in the comments below and I will get back to you asap.
However I am unable to answer the most obvious question (i.e. why did I spend £150 of my hard earned cash on 3 books...)
Does Urien get any special detachments?
Coven Coterie Detachment
from the above select a min of 2HQ and 2 Elites
Lets you reroll warlord traits
Enemy units within 12" suffer -1 LD
Below are formations
After warlord traits roll on the following table All units of Grots gain the corresponding result:
1 +1 Strength
2 +1 T
6 FnP 4+
All Wracks have precision strike (if within 12" of Haemi)
PfP is one turn higher. Cumulative with other boosts.
Haemi automatically has master Epicurean warlord trait: (if WL is slain by a AP2/1 weapon gain D3 victory points)
If unit from formation gets first blood - D3 VP
All wracks start on venoms and begin in reserve. They must DS in turn 1 by Deepstrike.
1x Talos unit (of 5 models)
Every time a unit from this formation destroys an enemy non-vehicle unit in CC gain 1 VP. In missions where players earn VP for completely destroying enemy units controlling pkayer gains 1 additional VP every time the above conditions are met.
Talos also gain Scout.
All units must be fielded as a single unit (although this is not usually allowed). Models with the IC rule cannot join this unit.
Formation's Talos / Cronos add 1 to their WS
If Haemi is your warlord, his trait is all talos / cronos with 12" reroll FnP rolls of 1.
This is ASKING to have a WWP thrown in...
Master of pain rule (+1 to PfP) affects all units in formation, not just those within 12"
Warlord + wracks he is in unit with have FnP 4+
Carnival of Pain
1x of all the above
As long as Urient / Haemon from Grot formation is alive, PfP +1 turn for all units.
All non-vehicle models reroll to wound rolls of 1 in combat.