Mistakenly Bound to the Ruthless Immortal: He Calls Me His Dao Companion

She transmigrated with one goal: win over her gentle senior brother and live peacefully. But a system malfunction binds her to the cultivation world's most terrifying figure—a cold, ascetic War God known for his heartless path. Her best friend warns her: 'He kills his wives to prove his Dao!' Forced to play the role of his most insignificant disciple, she tries to stay invisible. Yet somehow, this icy immortal who should despise attachments keeps calling her his Dao companion.