Christ Himself is the sword. Lets look at passage in Hebrews that inspired your contemptuous remark.
Heb 4: 12 For the word of God is living and powerful, and sharper than any two-edged sword, piercing even to the division of soul and spirit, and of joints and marrow, and is a discerner of the thoughts and intents of the heart. 13 And there is no creature hidden from His sight, but all things are naked and open to the eyes of Him to whom we must give account.
The word is Christ as in John 1:1
1 In the beginning was the Word, and the Word was with God, and the Word was God. 2 He was in the beginning with God. 3 All things were made through Him, and without Him nothing was made that was made. 4 In Him was life, and the life was the light of men. 5 And the light shines in the darkness, and the darkness did not comprehend[a] it.
So the Word is judging you dividing you soul from spirit joints and marrow discerning your thoughts and the intentions of your heart. All is laid bare and there will be no excuses on the day of your judgment there will be no defense. Because the truest intention of your heart will be laid open examined and righteously judged.
The "Sword" is your judge.