Dark Angels: Brilliant Strategist

In your Command phase, you can select one friendly Dark Angels unit within 6" of this WARLORD. Until the start of your next Command phase, if the Tactical Doctrine is active for your army, then each time a model in that unit makes an attack, the Devestator Doctrine is considered to be active for that attack instead; if the Assualt doctrine is active for your army, then each time a model in that unit makes an attack, the Tactical Doctirne is considered to be active for that attack instead.