Places the Hunter's Mark on the target, increasing the ranged attack power of all attackers against that target by $s2 and by an additional ${$m2/10} each time they are struck by a ranged attack, up to a maximum of ${$m2*4}.  In addition, the target of this ability can always be seen by the hunter whether it stealths or turns invisible.  The target also appears on the mini-map.  Lasts for $d.