[quote=@Memory]

<Snipped quote by The Monitor>

Could we possibly trap these things in a reality they think is real, but is more of a prison?
[/quote]

I don't think that is the best strategy, we should aim at exterminating them as we come across them regardless, but we could, though i highly doubt they'd stay trapped there... regardless of what we pull, our essence, even our very magic essence, is entirely different to anything that belongs to Outer C'thon or adjacent, they'd smell the artificiality from a mile away.