Ji Bo often had a problem that troubled him all his life: he couldn't wait for others to finish what they said.
He traveled through time and became Mel Nygard Bonjhin.
On his first day of being conscripted into the Imperial Guard, he was placed in solitary confinement for punching a demonstration psyker in the face while an instructor was demonstrating psionic protection. The reason is - "The way he is doing the seals looks like he deserves a beating."
From the bottom of the hive to the interstellar battlefield, he discovered that he had a strange talent: he could always shut up the enemy in the simplest and crudest way 0.3 Seconds before he was about to release his ultimate move. A sacrilegious ritual by a Chaos Sorcerer? A hot melt bomb shattered the magic weapon. The WAAAGH howl of the orc battle boss? A trench shovel was slapped into the mouth. A prophecy from an Eldar prophet? The prophecy predicts how you will receive this punch.
He has no psychic talent, no mechanical modifications, and has never even worn a serious set of Stormtrooper armor. But all the extraordinary beings in the entire galaxy fell into awkward silence in front of his "starting gesture".
Because he never gives you a chance to start.
And when the shadow of the power of Khorne enveloped the entire sector, and a large-scale ceremony that required the recitation of a hundred thousand true names to be completed was being prepared - the entire galaxy turned its attention to this ordinary Imperial guard.
"Interrupting one spell is called quick reaction. Interrupting a hundred thousand - that's called faith."