Foxkin

You have some sort of spiritual connection to a type of mystical fox. Be you a member of a particular theives guild that gained it's boon for a favor, or happened upon it in the wild and earned it that way, you have adopted it's traits. Signs of your kinship are small, and hard to spot unless you know what to look for, a peculiar smile, a streak of white, or red hair, or eyes that gleam in low light

Pounce

When you pick this class at 3rd level, Twice per long rest, you can strike at a target up to 10 (+proficiency bonus) feet away. You can apply sneak attack damage to this regardless of advantage or nearby enemies. You regain half of your uses when you kill an enemy, you gain and addition 2 uses at 9th, 14th, and 18th levels.

Vulpine Nature

Also at 3rd level. You gain the Keen senses of a fox, giving you 20ft of Darkvision. In addition, a creature cannot use its darkvision to spot you.

Sly Stalker

At 9th level, you gain a bonus of +10 to every stealth check after the first in a sequence, this does not stack.

Predatory Strike

By 13th level, you know how to exploit an enemies weak spot to weaken it's senses. When you land a sneak attack, Your target must make a constitution saving throw (DC=12 +dexterity modifier) on a fail you can either impose disadvantage on all attack rolls made by the creature or impose advantage on all attack rolls made on the creature until the end of your next turn.

Fox Cloak

When you reach 17th level, you gain a great affinity with the your fox spirit. Once per short rest, you can take an action to assume to form of a fox. While in this form, your size is small, Your movement speed is doubled, your movement provokes no reaction, and attack rolls against you have disadvantage. You also have advantage on dexterity and wisfom saves. You can deactivate this effect at any time, otherwise it lasts for 3 turns in combat, or for 10 minutes outside of combat.

Pounce

Starting at 3rd level, Twice per long rest, you can strike at a target up to 10 (+proficiency bonus) feet away. You can apply sneak attack damage to this regardless of advantage or nearby enemies. You regain half of your uses when you kill an enemy, you gain and addition 2 uses at 9th, 14th, and 18th levels.

Vulpine Nature

When you choose this archetype at 3rd level, you gain the Senses of a fox, giving you 20ft of darkvision

In addition, a creature with darkvision cannot use it to spot you.

Sly Stalker

Starting at 9th level, you gain a bonus of +10 to every stealth check after the first in a sequence, this does not stack.

Predatory Strike

By 13th level, you know how to exploit an enemies weak spot to weaken it's senses. When you land a sneak attack, Your target must make a constitution saving throw (DC=12 +dexterity modifier) on a fail you can either impose disadvantage on all attack rolls made by the creature or impose advantage on all attack rolls made on the creature until the end of your next turn.

Fox Cloak

When you reach 17th level, you gain a great affinity with the your fox spirit. Once per short rest, you can take an action to assume to form of a fox. While in this form, your size is small, Your movement speed is doubled, your movement provokes no reaction, and attack rolls against you have disadvantage. You also have advantage on dexterity and wisfom saves. You can deactivate this effect at any time, otherwise it lasts for 3 turns in combat, or for 10 minutes outside of combat.