Unmodifiable
Unmodifiable is a property of items belonging to certain item classes. An item that is unmodifiable cannot have any of its properties, base stats or modifiers altered by any means. The only exception is that an unmodifiable item can be identified using a 
Scroll of WisdomScroll of WisdomStack Size: 40Identifies an itemRight click this item then left click an unidentified item to apply it.
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Unmodifiable item classes
Item classes that are unmodifiable include:
- Memories
- Relics
Primeval RemnantPrimeval RemnantContains a Forge that can Combine Crucible Passive Skill TreesUnmodifiableKalandra watched as the almighty titans fell,
relegated to the innermost depths of the world,
where horrific abominations awaited them.Open portals to The Forge of the Titans by using this item in a personal Map Device.
Primordial RemnantPrimordial RemnantContains a Forge that can Combine Crucible Passive Skill Trees, including on Unique and Corrupted ItemsUnmodifiableKalandra watched as the almighty titans fell,
relegated to the innermost depths of the world,
where horrific abominations awaited them.Open portals to The Forge of the Titans by using this item in a personal Map Device.
Historically, sentinels and sanctified relics were also unmodifiable.