Martial Discretion

Use this stratagem in your Command Phase, after selecting a ka'tah stance to be active for your army. Select one ADEPTUS CUSTODES unit from
your army, then select one ka'tah stance that is not active for your army. Until the start of your next Command Phase, that unit benefits from that
stance, instead of the active ka'tah stance(s) of your
army. If that ADEPTUS CUSTODES unit contains 4 or fewer models, this Stratagem costs 1CP; otherwise,
it costs 2CP.