The value of Monarch Grade Immortal Artifacts specialized in soul defense, although comparable to pure defensive King Grade Immortal Artifacts, is such that those who possess the former typically wouldn't exchange it for the latter.
In fact, even for pure defensive King Grade Immortal Artifacts nurtured by an Immortal Sovereign, those with Monarch Grade Immortal Artifacts for soul defense wouldn't trade them.
This is because Monarch Grade Immortal Artifacts for soul defense are extremely rare, not only are they difficult to craft, but the materials required are exceedingly scarce.
Monarch Grade Immortal Artifacts for soul defense can block any soul attack from normal Immortal Lords and below!
Any soul attack below the Immortal Lord level, even if infused with the profound mysteries of Law, it can be blocked.
