Mastermind

Revised from base 5e

Your focus is on people and on the influence and secrets they have. Many spies, courtiers, and schemers follow this archetype, leading lives of intrigue. Words are your weapons as often as knives or poison, and secrets and favors are some of your favorite treasures.

Master of Intrigue

3rd-level Mastermind feature
You gain Proficiency with the Disguise Kit, the Forgery Kit, and one Gaming Set of your choice. You also learn two Languages of your choice.
Additionally, you can unerringly mimic the speech patterns and accent of a creature that you hear speak for at least 1 minute, enabling you to pass yourself off as a native speaker of a particular land, provided that you know the language.

Master of Tactics

3rd-level Mastermind feature
You can use the Help action as a Bonus Action. Additionally, when you use the Help action to aid an Ally in attacking a creature, the target of that attack can be within 30 feet of you, rather than within 5 feet of you, if the target can see or hear you.

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Insightful Manipulator

9th-level Mastermind feature
You have Advantage on Tactics checks you make.
Additionally, when you use the Help action to aid an Ally within 5 feet of you, that Ally gains a bonus on their next Tactics check equal to your Intelligence modifier. This benefit lasts until the start of your next turn.

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Misdirection

13th-level Mastermind feature
You can sometimes cause another creature to suffer an attack meant for you. When you are targeted by an attack while a creature within 5 feet of you is granting you cover against that attack, you can use your Reaction to have the attack target that creature instead of you.

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Soul of Deceit

17th-level Mastermind feature
Your thoughts can't be read by telepathy or other means, unless you allow it. You can present false thoughts by succeeding on a Charisma (Deception) check contested by the mind reader's Wisdom (Insight) check.
Additionally, no matter what you say, magic that would determine if you are telling the truth indicates you are being truthful if you so choose, and you can't be compelled to tell the truth by magic.