The Genius Prince's Guide to Getting the Country Out of Debt (№ 441578)

“Not quite according to plan…” The prince plunged his blade into Dragwood as he leaned towards the sword. “I vowed to cut down anyone who offends my heart.

Quote Explanation: A battle between two armies. Dragwood sent his man to negotiate, and he insulted his childhood friend Ninim Raley, passing off his words as Dragwood's. Vayne came to take revenge, calling Ninim "my heart".