shadow assasination

You learn the way how to hide in the shadows and you gain the following benefits:

• add 1 to your dexterity score, to a max of 25 (yes 25, not 20) 
• whenever you hide and you are not in a fight  you gain 5 speed to all movement until you are hidden.  
• when you are hiding and you attack something by leaving the shadows and you smite down with your weapon on your target you gain 1d4 damage same as the type of the damage type what the weapon has.