So one of my players is a hexblade warlock, he is bound to levistus. (GLACIUS IF YOUR READING THIS GET OUT!) And he is tasked by levistus to collect one  special sword. Im thinking its along the line of Matthew Mercers Vestiges since we are playing in a Tal'dorei campaign. I want this sword to be sweet and help the warlock class exel more (since its a little underpowered overall.)

So since it's a vestige im thinking different "states" of awakening. 

here is what i have thought so far:

Dormant State 
The wielder gains a +1 bonus to attack and damage rolls made with this weapon.

Once a day the wielder cast Inflict wounds through their weapon as part of an attack, they can use their meele attack or their spell attack, which ever is highest.

Sweet betrayl: Whenever the wielder attacks a creature that regard them as their ally,  with advantage, add an additional 1d6.

Awakened State 

The wielder gains a +2 bonus to attack and damage rolls made with this weapon.

Once a day the wielder cast Shadow of Moil.

Sweet betrayl: Whenever the wielder attacks a creature that regard them as their ally, with advantage, add an additional 2d6.

Exalted State 
The bonus to attack and damage rolls increases to a +3 and the additional damage taken increases to 1d8 psychic damage.

Once a day the wielder cast Blight through their weapon as part of an attack, they can use their meele attack or their spell attack, which ever is highest.

Sweet betrayl: Whenever the wielder attacks a creature that regard them as their ally,  with advantage, add an additional 3d6.

-- any thoughts? I might add a bonus to con, since the player has been rolling shit on his lvl ups.  is it balanced you think?  the different states I controll through story beats. is this the lift the warlock class needs? any other ideas?