Help Necrons:
A psychomancer has the following 6" aura:
Nightmare Shroud (Aura): While an enemy unit is within 6" of this model, subtract 1 from the Leadership characteristic of models in that unit and subtract 1 from Combat Attrition tests taken for that unit.
The psychomancer is given the warlord trait Thrall of the Silent King pre-game:
THRALL OF THE SILENT KING
Add 3" to the range of this WARLORD's aura abilities (to a maximum of 9").
As The game progress the command protocol conquering tyrant is turned on and directive 1 is selected:
6. Protocol of the Conquering Tyrant
Directive 1: Add 3" to the range of this unit’s aura abilities (to a maximum of 12") and increase the range of the following abilities this unit has by 3" (to a maximum of 12"): Lord’s Will; My Will Be Done; Rites of Reanimation.
What is the range of his Aura? Here are my interpretations so far
Case 1) The Maximum Aura Range is specifically referring to the preceding sentence in the warlord traits/command protocols +3" on each aura ability
The base aura is 6".
The Thrall of silent king walord trait is selected. This ability boosts the aura to 9" and comply with the Max 9". The +3 from the Warlord trait has not moved it beyond 9.
The Command Protocol Boosts the aura from 9 to 12. This satisfies Command protocol clause of max
12".
The Thrall of Silent Kings clause is still satisfied of +3 max 9 since it hasn't increased the range of aura, another different ability has.
Case 2) Its all about sequencing and layers - Turn order.
Since Both Rules state a differing maximum range, the players which turn it is can choose to stack the modifiers in whichever order they choose.
Your turn:
+3 from warlord trait to 9".
Followed by +3 from Command protocols to
12".
Case 3) Its all about sequencing and layers - Pre battle selection.
The rules are applied in the order they are active. The warlord trait occurs pre-game so happens first.
Your turn:
+3 from warlord trait to 9".
Followed by +3 from Command protocols to
12".
Case 4) The Rules conflict - The Thrall of Silent is King overrides everything.
The Maximum
9" is universal and not just applying to preceding line on the +3 in the warlord trait description. A prohibitive actions tends to overrule an allowed action in
40k.
Currently, I am erring towards case 1, that the warlord trait is self referencing, its only saying the maxinium of 9 is specifically from the +3 of its own ability (and not discussing other abilites that may interact with auras).