Treason of Tzeench

The psyker reaches his thoughts into the minds of his victims, subverting their will and turning them upon
their own allies.
If manifested, select an enemy CHARACTER
that is within 18" of the psyker and visible to him (excluding Warlord) and roll 2D6. If the result is greater than the character's Leadership, until the
end of the following Fight phase treat that
character as if it were a friendly model in your Shooting, Charge and Fight phases.