Bonus Cantrip
When you join the College of Jesters at 3rd level, you gain the vicious mockery cantrip, which doesn't count against the number of cantrips you have. If you already have it you can pick a different cantrip. When you cast it, roll d6s instead of d4s for the spell's damage
Fool's Mockery
At 3rd level, you are quick to capitalise on your foe's failures, mocking their misfortune and invigorating your allies. When a creature you can see with 60ft fails an ability check, attack roll, or saving throw, you can expend a use of your Bardic Inspiration as a reaction and mock it relentlessly for its failure. Choose one of the following effects:
If the target can hear you, it takes psychic damage equal to 2 rolls of your Bardic Inspiration. A creature doesn't take the damage if its immune to being charmed
Choose a creature within 30ft of the target that can both see and hear you; that creature gains a Bardic Inspiration die
Prodigious Performer
At 3rd level, your performance never fails to strike home in one way or another. When you make a Performance check, you can treat a d20 roll of 9 or lower as a 10
Derisive Incantations
At 6th level, Whenever you cast a spell with a verbal component that forces a creature to make a saving throw, you can lace the spell's verbal component with distracting and deriding words. If a creature fails its saving throw against the spell and is able to hear you, it has disadvantage on ability checks and attack rolls until the start of your next turn
Reversal of Fortune
At 14th level, you can rouse luck itself to smile upon you and frown upon your foes. As a reaction, after you or a creature you can see within 60ft makes an ability check, attack roll or saving throw, you can flip a d20 upside down, or both d20s if the roll was made with advantage or disadvantage. You make this decision after you see whether the roll succeeds or fails.
If this turns a creature's success into a failure, you can use your Foll's Mockery on that creature as part of the same reaction without expending a use of your Bardic Inspiration. You can choose both effects when using Fool's Mockery in this way.
Once you turn a success into a failure or vice versa with this feature, you can't use it again until you finish a long rest