Battle Standard

It temporarily increases movement speed, swing speed, and throw speed for about 8 seconds whenever the player enters a new room with enemies; this does not apply to hidden enemies that must be triggered like Skeletons, Mimics, and Wolf Spiders. Killing all enemies before the effect ends will not prematurely end it.

It's buff is called.

Stats

 * Provides a Swing Speed increase of 0.5
 * Provides a Throw Speed increase of 10
 * Movement speed increase unknown