You're the most deadliest when operating from the shadow. Using the terrain to your advantage they never had a change. Being potent with poison you get from the nature, you're able to use your darts for deadly blows. Being adapt to nature makes you a great scout, hunter, tracker or stealth infiltrator. 

Sami potent potion

Starting at 3rd level, you can prepare and deliver deadly poisons, granting you the following benefits:

• When you make a damage roll that deals poison damage, it ignores immunity or resistance to poison damage.
• You can apply poison to a weapon or piece of ammunition using a bonus action.
• You gain proficiency with the Poisoner's Kit if you don’t already have it. With one hour of work using a poisoner’s kit you can create a number of doses of potent poison equal to twice your proficiency bonus. Once applied to a weapon or piece of ammunition, the poison retains its potency until it finds a target or until your next short or long rest. When a creature takes damage from the coated weapon or ammunition, that creature takes 2d8 poison damage and must succeed on a Constitution saving throw equal to your WIS spell save DC or become poisoned until the end of your next turn.

Ambusher

At 3rd level, you master the art of the ambush. You can give yourself a bonus to your initiative rolls equal to your Wisdom modifier.
At the start of your first turn of each combat, your walking speed increases by 10 feet, which lasts until the end of that turn. If you take the Attack action on that turn, you can make one additional weapon attack as part of that action. If that attack hits, the target takes an extra 1d8 damage of the weapon’s damage type.

Hidden by nature

At 3rd level, you are one with nature. You gain the following benefits:

• You can try to hide when you are lightly obscured from the creature from which you are hiding. You gain a +5 bonus to Dexterity (Stealth) checks as long as you remain there without moving.
• When you are hidden from a creature and miss it with a ranged weapon attack, making the attack doesn't reveal your position.

Nature's way

By 7th level, you feel the way of nature. You can flow like water or by solid as a rock. When an attacker that you can see hits you with an attack, you can use your reaction to halve the attack’s damage against you. Even if you can't see the attack because it forces you to make a saving throw you saw this coming. You gain proficiency in Wisdom saving throws. If you already have this proficiency, you instead gain proficiency in Intelligence or Charisma saving throws (your choice).

Dead by many stings

At 11th level, you learn to attack with such unexpected speed that you can hit many creatures at once with your ranged weapon. You can use your action to make a ranged attack against any number of creatures within 10 feet of a point you can see within your weapon’s range. You must have ammunition for each target, as normal, and you make a separate attack roll for each target.

Shadowy Dodge

Starting at 15th level, you can dodge in unforeseen ways, with wisps of supernatural shadow around you. Whenever a creature makes an attack roll against you and doesn’t have advantage on the roll, you can use your reaction to impose disadvantage on it. You must use this feature before you know the outcome of the attack roll.