Life and death are in the power of the voice, and none know this better than orator bards. Any loud mouth might sway a listener to support a noble cause or thwart an evil plot, but the skilled orator reveals deeper truths to listeners—truths which are not at first readily evident.
When you choose this archetype at 3rd level, you gain proficiency in Insight and Performance, along with its speaking skill specialty. If you are already proficient with either skill, you instead gain an expertise die. In addition, you gain additional specialties equal to your proficiency bonus, and you gain another specialty whenever your proficiency bonus increases. These bonus specialties must be in Insight or Performance.
Also at 3rd level, your passion instills additional competence in your allies. When a creature you have granted Bardic Inspiration to uses it where you can see it and it can hear you, you can spend your reaction to call out to it, allowing it your roll your Bardic Inspiration die as though it were one step higher. When your Bardic Inspiration die becomes 1d12, the creature instead gains an expertise die. Once you have used this feature a number of times equal to half your proficiency bonus, you must f inish a short or long rest before you can use it again.
In addition, you learn to use Bardic Inspiration on yourself, but only to make Performance checks.
At 3rd level you hear the truth despite attempts to obscure it. You can use an action to spend 1 use of Bardic Inspiration and target one creature you can hear. For the next 10 minutes, you are aware if any of its statements are lies or attempts to mislead or leave out information. This does not allow you any knowledge of the true answer. You can ask the creature clarifying questions, but it is not compelled to answer.
At 6th level, your words are imbued with both knowledge and emotion, imparting the truest of feelings. When a creature you have granted Bardic Inspiration to uses it to make a Intelligence, Wisdom, or Charisma saving throw, it also gains an expertise die to the roll.
Additionally, when you spend at least 1 minute (including through use of the enthrall spell) orating to an audience, roll a Performance check. Your words affect each creature that can hear you whose passive Insight is less than or equal to the result. A willing creature can choose to be affected. A creature remains affected for a number of hours equal to half your proficiency bonus. Whenever you use this feature, choose one of the following options.
A creature can be affected by only one option at a time. Casting calm emotions immediately ends the effect on an affected creature if the caster can make a spellcasting ability check that exceeds your Performance check. Otherwise, the spell works as normal. Once you use this feature, you cannot do so again until you complete a short or long rest.
At 14th level you learn the mass suggestion spell. It does not count against your number of spells known. If you already know this spell, you instead learn another bard spell of a level you can cast. After speaking for at least one minute (including through use of the enthrall spell), you can cast mass suggestion without components or expending a spell slot. Any observers with a passive Insight score equal to or less than your passive Performance score do not see or hear you cast the spell. As part of the action to cast the spell, you can spend one use of Bardic Inspiration to affect up to 12 more creatures.