Amused by the thought of other types of mimics...

[Mark]

As an added bonus, they should appear by being cloned from existing monsters, so you wouldn't be able to tell which one is the real one.

With that tech we could create an 'actual' displacer beast, no?

[Timo Pietilä]

What, did Morgoth find a +999 amulet of charisma?

He did a dog collar of power and distributed them to Feanor brothers, then One Collar to rule them all and darkness bind them, and wore it himself.

Where did you think the idea of the Rings came from?

[Derakon]

With that tech we could create an 'actual' displacer beast, no?

We'd have to code them to stick close to each other, but yeah, otherwise this would just about fit the bill.