Excalibur Ruler

Excalibur Ruler known as the Holy Sword of Control, is a Holy Sword and one of the seven Excaliburs.

Summary
One of the Seven Excaliburs created after the Original Excalibur broke. It went missing after its creation. The sword was found by Arthur who combined his family intel with Vali's information. It was wielded by Arthur Pendragon until volume 11 where he abandons the sword.

Abilities
Excalibur Ruler is the strongest Excalibur Sword of the seven. It grants the user the ability to control his/her opponent. With time, the controled opponent will lose their will and become fully subjugated.