RPG 2 – The demons are coming!!!

I dodged the scythe and, using the momentum from the turn, slashed diagonally with my sword...

The sword passes through the cloak, which is strangely sticky like jelly, and stops somewhere in the middle of the Herald's "body." A terrible shriek pierces your eardrums. The Herald begins to glow from within... brighter... even brighter... the light slowly begins to be absorbed by the sword.
- The Soul Hunter has accepted you! - a voice echoes as if from all sides. You break out in a cold sweat.
Darkness descends.
(From your perspective during the battle, your body was constantly twitching, and various emotions were constantly changing on your face. And finally, peace came.)
You sleep peacefully for a while, and can wake up without any visible consequences.
In your hand is a sword.

The "Soul Catcher" Sword
You cannot part with it. If it is even a short distance away, you will immediately be overcome by a fit of rage, and without thinking, you will try to get it back.
Sword +2 to attack. Upon impact, the opponent receives spiritual wounds. If the sword remains in the creature for a long time (10-20 seconds), the creature's soul is absorbed into it. This increases the attack by 0-3 (depending on the soul). The bonus attack decreases by 1 each day.
You are obligated to fulfill the tasks of the Soul Hunter.