Magnus has the ability :
Unearthly Power:
You can re-roll Psychic tests taken for this model. Each time a Psychic test or Deny the Witch test is taken for this model, add 1 to the result (if this model has 10 or more wounds remaining, add 2 to the result instead).
Does is stack with :
BROTHERHOOD OF SORCERERS :
- Add 1 to Psychic tests taken for this unit.
So on full health Magnus would have +3 to Psychic test on full health?