Great Company Banner

Add +1 to the Space Marine combat resolution socre of any assault that takes place within 6" of the Great Company Banner. Additionally, once per game the banner may be activated to grant all Space Marines within 2D6" to gain +1 Attack for the rest of the turn. Note it may be activated during the enemy's turn.
However, if the model bearing the standard is slain in close combat, then the enemy model that slew him captures the standard gains the +1 bonus to combat resolution from then on. It is possible for the model to change hands multiple times per game.