You manifest a continuous battle cry that prevents you from talking, but does not interfere with your breathing. This battle cry boosts the morale of some while filling others with dread.
You are given one negative point and one positive point for every level you possess. You may give a target in range no more than two points. This represents the effect of the cry on the chosen subject. Each positive point bestows a +1 morale bonus on their attack rolls, ability checks and saving throws, and each negative point bestows a -1 morale penalty to the same rolls. These points stack with each other, but not with other morale bonuses or penalties, not even those from another howl. You may choose yourself as a recipient of points.
Targets receiving points hear the pounding of drums in their head for the duration of the power. Unaffected people in range hear the drums, but only softly. This latter effect is the mental display, and it persists for the duration of the power.
Once a round, as a swift action, you may change the recipients of up to a number of points equal to half your level, rounded down. You can redistribute more at the cost of a move action. All points need not be expended each round. New recipients must be within 50 ft. of you.
Targets that move more than 50 ft. from you lose any bonus/penalty from points they carry. If they come back into range, their points become active again. You may reassign points away from them while they are out of range.
If you are silenced by a gas attack, magical silence, etc, or if you decide to close your mouth, the howl ends, but its echoes persist until the end of the round.
Points have no effect on deaf creatures. Unwilling recipients may make a will save for each point as it is assigned to them. Such points have no effect on the target, though they still count towards the two-point limit. They may be reassigned to different creatures, or even the same creature again. Points that fail due to power resistance are wasted and cannot be reassigned, though they do not count towards the two-point limit.
The power ends after the duration expires, if you are silenced by a gas attack, magical silence, etc, or when you close your mouth or cease concentration.
For every two additional power points you spend, this power can last one round more.
All or part of this power is open game content, as described here.