You are a shadowwalker - a rogue who is tapped into the dark magics creeping in the shadows. You are able to blend into darkness more thoroughly and are able to perform feats that would be considered supernatural.
3rd-level Shadowwalker Archetype feature
You learn to harness magic from the shadows.
Spell Slots : The Subteley Spellcasting table shows how many spell slots you have to cast your spells of 1st level and higher. To cast one of these spells, you must expend a slot of the spell's level or higher. You regain all expended spell slots when you finish a long rest.
Spells Known of 1st-Level and Higher : You know two 1st-level subtlety spells of your choice.
The Spells Known column of the Subtlety Spellcasting table shows when you learn more subtelty spells of 1st level or higher. Each of these spells must be of a level for which you have spell slots. Whenever you gain a level in this class, you can replace one of the subtely spells you know with another spell of your choice from the subtlety spell list. The new spell must be of a level for which you have spell slots.
Spellcasting Ability : Intelligence is your spellcasting ability for your subtely spell, since you learn your spells through dedicated study and memorization. You use your Intelligence whenever a spell refers to your spellcasting ability. In addition, you use your Intelligence modifier when setting the saving throw DC for a wizard spell you cast and when making an attack roll with one.
Spell save DC = 8 + your proficiency bonus + your Intelligence modifier
Spell attack modifier = your proficiency bonus + your Intelligence modifier
3rd-level Shadowwalker Archetype feature
Your thoughts cannot be read by telepathy or other means, unless you allow it. You can present false thoughts by making a Charisma (Deception) check contested by the mind reader's Wisdom (Insight) check.
7th-level Shadowwalker Archetype feature
You are more adept at striking from the shadows. When you make an attack with advantage and the attack hits, it deals an additional 1d6 damage.
13th-level Shadowwalker Archetype feature
You can use your reaction when you take damage from an attack or spell to step into the shadows, giving you immunity to all damage until the end of the next turn, including the triggering attack.
You can use this feature twice. You regain expended uses when you finish a short or long rest.
17th-level Shadowwalker Archetype feature
You learn to conjure illusory doubles to strike at your foes. Immediately after you deal your Sneak Attack damage to a creature on your turn, you can use your bonus action to target a second creature that you can see within 30 feet of the first creature. Make an attack roll with the same weapon against this creature; if the attack succeeds, it deals psychic damage equal to your Sneak Attack damage instead of the attack's normal damage.