the shapeless shadow bind with the user after attunement takes on the form of a weapon that the user is proficient with. after reaching 3rd level the weapon becomes a +1 weapon (if improved pact weapon was taken it becomes a +2). at 5th level it becomes a +2 (as stated earlier it becomes +3 if improved pact weapon was already taken). at 10th level it becomes a +3 (stays at +3 even with improved pact weapon). at 15th level the weapon soon gains the ability to shape change to all martial and simple melee weapons allowing the one attuned to become proficiency in that weapon. at level 20 the weapon gains the ability to change into any weapon both ranged and melee as well as increasing spell save dc and spell attack by 3. the cost for the weapon chance takes an action as well as having the type of ammunition if it is ranged. to maintain the pact user must make the final blow to target allowing zenoedge to drain all blood or other fluids from the target if not done within 24 hours weapon with drain 1d10 damage worth of blood to maintain the pact after 48 hours zenoedge will cause 3 levels of exhaustion. at 72 hours zenoedge will drain the users body dry killing the user before going into a dormant state awaiting the next pact. 

Proficiency with a Longsword allows you to add your proficiency bonus to the attack roll for any attack you make with it.

Notes: attunable to warlocks (hexblade) only requires pact of the blade requires atleast 24 hours to attune, Versatile, Sap