Talk:Banner of Command/@comment-25411532-20150802163432/@comment-27124958-20151027033002

It only makes the promoted minon immune to magic, while the bonus MR from the aura goes to all nearby allies within 1100 range, including non-promoted minions.

If your opponents are smart, they will send their ADC to deal with the promoted siege leaving the AP waveclear to help defend the lane where your team is pushing, and since you are there with the aura, the wave you are with gains some resistance to the AP waveclear that you will likely be facing. While the item is strong on it's own for the promote, in this particular situation (which is what your goal should be with this item on board) the item becomes a bit stronger.