College of Antithesis

To learn an enemy's every weakness, to exploit them until its
end; to scourge a name until it pales in infamy, to curse its
memory until it dims. Such is the work of a bard of the
College of Antithesis, agents of perfect destruction.

Bonus Proficiencies

When you join the College of Antithesis at 3rd level, you learn
two damaging cantrips from the sorcerer, warlock or wizard
spell lists.

Curse of Unmaking

Also at 3rd level, you learn to harrow your enemies with
curses. When an enemy that you can see within 120 feet
makes a saving throw to avoid damage, you can use your
reaction to wrack them with a debilitating curse.
Before the result of the save is declared, you may roll a
Bardic Inspiration die and subtract the amount rolled from
the triggering save, or add its value to the damage they
receive. The cursed saving throw only applies to damage, and
not for any other effects that may accompany it.

Bloody Dirge

Beginning at 6th level, you can turn your enemy's despair into
a weapon. When a spell or curse of yours kills or renders a
hostile creature unconscious, you can use your reaction to
amplify their screams. All other creatures of your choice
within 15 feet of the fallen creature must make a Wisdom
saving throw against your spell save DC. On a failure, they
receive half of the incapacitating damage as psychic damage.

Echo of Annihilation

When you reach 14th level, the malice of your curses imbues
them with life. As an action, you can expend two Bardic
Inspiration dice to curse a creature that you can see within
120 feet for up to 10 minutes. A persistent, antagonistic force
looms over it, pursuing it relentlessly and attacking it.
This dread force has a flying speed of 30 feet, and always
dashes or moves in order to make melee attacks against your
cursed target each round (immediately after your turn). It
deals force damage equal to two rolls of your Bardic
Inspiration dice + your Charisma modifier, using your spell
attack bonus. If the cursed creature dies, it remains within 60
feet of its body, attacking your other enemies until it expires.
As an action while your living curse is active, you can call
upon it to envelop a creature it is attacking in an obliterating
embrace. If the creature fails a Wisdom saving throw against
you spell save DC, the target takes force damage equal to five
rolls of your Bardic Inspiration die, and is knocked prone and
flung 30 feet away from you. On a success, it only takes half
as much damage.