The Begetting Blade
simple melee weapon (special dagger), very rare, (requires attunement)
"...for those who seek to whet the appetite of their blade against bone rather than stone often find returned in kind their flavor of diplomacy."
There is a dull rust-like tint to the otherwise shiny blade of this heavy dagger, but it remains sharp and without defect. The handle is longer than other daggers and gives a noticeable weight to it that would make it poor for throwing, but somehow it feels right in your hand. While looking at the blade, you remember an insult or a slight from yesterday, but then you question whether the memory was real.
The Begetting Blade functions as a +1 dagger with modified statistics: 1d4 piercing, finesse, light, graze. It can be thrown (range 40,) but all ranged attacks with the Begetting Blade have disadvantage to the attack roll. The +1 enhancement is added to attack rolls and damage rolls.
Attunement to the Begetting Blade requires taking a bonus action to pantomime some manner of violent gesture. When a character is attuned to the Begetting Blade, the attuned character gains the ability to cast the True Strike cantrip. While attacking with the Begetting Blade, an attuned character may choose to cast True Strike as part of the action used to make the attack. When an attuned character uses the Begetting Blade to make an attack, the target of the attack gains advantage on the next weapon attack the target makes against the attuned character (even if no longer attuned when that next attack is made).