Stalker

Whether you are a pervert or an Assassin for a secret company, you had to stalk your target and learn about their identity for your own gain. In the end, you became a master at it.

Hunt Begins

Before marking a creature with Obsession, you can spend at least 1 hour observing or gathering information about them. This could include tracking their movements, watching them from a distance, or obtaining information from people familiar with them. Once you have done so, you gain insights into their behavior, and can mark them as your Obsession without spending your Mark point and can also use your Speciality skills without using your Obsession point just for one time

Obsession

You can use your bonus action to mark a target as your obsession. While a target is marked, you have disadvantage on attacks against any creature other than that target. This effect lasts until the target dies or you choose to mark another target with exceeding another point. When you mark a target, you can make Stealth attacks against it without needing advantage; however, you still cannot use Sneak Attack if you have disadvantage. Also you have advantage on Wisdom (Perception) and Wisdom (Survival) checks made to locate or follow your Obsession. You can use this feature a number of times equal to your proficiency bonus, and you regain all expended uses after a short rest. 

Obsession Point: You have a feature called Obsession Point  this feature makes you able to use your speciality skills with according levels, you can regain usage with each critical hit you made to your Obsession target also with short or long rest This points is fixed value with 4

• 3rd: If your Obsession is out of sight, you may spend 1 Obsession Point to sense the general direction and distance of your target within a range of up to 1 mile. This effect lasts for 1 minute.
• 9th: If your Obsession is within 60 feet of you and in your line of sight, you may spend 1 Obsession Point as a bonus action to teleport to an unoccupied space within 10 feet of it.
• 13th: if your Obsession attacking you, you may spend 1 Obsession Point as a reaction  you can impose disadvantage on that roll. If they miss, they must make a Wisdom saving throw (DC = 8 + your proficiency bonus + your Charisma modifier). On a failed save, they are unable to target you with attacks until the end of their next turn.
• 17th:  When you hit your Obsession with a weapon attack, you may spend 3 Obsession Points to treat the attack as a guaranteed hit, and adding an additional 3d6 psychic damage.

Shadow Step

At 9th level, you can spend 1 Obsession Point as a bonus action to teleport to an unoccupied space within 10 feet of your Obsession if it’s within 60 feet and in line of sight. You gain advantage on your next attack against it before the end of your turn.

Sixth Sense

If your Obsession is out of sight, you may spend 1 Obsession Point to sense the general direction and distance of your target within a range of up to 1 mile. This effect lasts for 1 minute.

Echoing Doubt

You can invoke self-doubt in your target's mind. As a reaction when they make an attack roll, you can can spend one Obsession point and can impose disadvantage on that roll. If they miss, they must make a Wisdom saving throw (DC = 8 + your proficiency bonus + your Charisma modifier). On a failed save, they are unable to target you with attacks until the end of their next turn. Also you have Advantage in Investigation (Intelligance) for tracking your Obsessed target out of combat

"Can you feel Death’s cold Breath?"

At 17th level, you reach the pinnacle of your Stalker powers, striking with ruthless precision. When you hit your Obsession with a weapon attack, you may spend 3 Obsession Points to treat the attack as a critical hit, adding an additional 3d6 psychic damage.

When your Obsession falls to 0 hit points, you can choose to extract an eerie 'last memory' by spending 1 Obsession Point. You gain a brief vision of the Obsession's most recent thoughts, memories, or locations visited.

 

Additionally, if your Obsession drops to 0 hit points, you regain all expended Obsession Points.