Mortisan Council: the caster-support formation (AoS 4th Ed)
The all-rounder pick that sharpens your Mortisan wizards and slots into almost any Bonereapers list.
SprueSentry strategy commentary for Age of Sigmar 4th edition, not official rules. Games Workshop updates points and rules regularly — always confirm against the current official rules and your latest dataslate before a game.
Mortisan Council is widely regarded as the default Ossiarch Bonereapers formation because nearly every list fields at least one Mortisan. It is reported to improve your infantry Wizards' casting. Confirm the exact bonus and any conditions in your current Battletome, as wording can change with errata.
What the formation does
Boosts your Ossiarch Bonereapers infantry Wizards/Mortisans, reported as +1 to casting rolls. That makes your spells more reliable and your Mortisan support more consistent across the game. Verify the precise effect against your Battletome.
Who it suits
Players who want a low-commitment, broadly useful formation, and any list leaning on Mortisan casters for buffs, healing, or utility. A strong first-time pick while you learn the army.
Key units
- Mortisan Boneshaper, Soulmason, and Soulreaper (your casters)
- Mortek Guard and elite constructs as the bodies the casters support
- Any centrepiece Hero whose effects you want to land reliably
When to pick it
Choose it when your list has two or more Mortisans, or when you simply want the most universally applicable formation rather than a niche one. It is the safe default in a balanced, objective-holding build.
Common questions
Why is Mortisan Council considered the default?
Because most Bonereapers lists already include at least one Mortisan, so its casting buff almost always applies, unlike the more unit-specific formations.
Do I need lots of wizards to benefit?
No - even one or two Mortisans get value, but the more casters you run, the more the formation pays off. Check the current Battletome for exactly which models qualify.
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Written by SprueSentry with SprueSentry editorial (hand-authored, research-grounded), grounded in the cited sources — original commentary, not Games Workshop rules text.