In reality, unless they've gone utterly insane, the Assassin Alliance wouldn't dare build a death feud with a leading immortal sect.
Even though Ying Country is not among the leading immortal sects, its strength is not less by any means.
And further, who is Ultimate Sword Immortal? To disrespect my father-in-law a bit, does Emperor Ying the Third deserve Ultimate Sword Immortal to take his action?
"To kill Ying the Third, I only need to buy insiders within the imperial palace, there's no need to mobilize a powerful figure who reached the Tribulation Transcendence stage." Ji Changsheng muttered to himself under his breath.
The situation differs in Ying Country and the top-tier immortal sects. As for the assassination of a pavilion master who reached the Tribulation Transcendence stage like an Ultimate Sword Immortal, this might be understandable.
But Ying the Third's actual strength might not even be higher than Ji Changsheng's at the moment.