SCP Foundation

SCP-!LG is written 22 times in a fairly short article. Maybe replace some of it with "the object(s)" or something like that.

Special Containment Procedures:

This should be in bold, so should all your other subheadings (description, discovery log, etc)

Instances of SCP-!LG are themselves inanimate, requiring only to be collected upon manifestation

This seems a little wordy. I don't need to know they're inanimate at this stage, just that they're collected and stored.

SCP-!LG resemble ceramic lawn gnomes

You don't specify what they actually are after this. From what I can tell they are lawn gnomes, just lawn gnomes with anomalous properties.

see Incident Report !LG001.
Incident !LG001, during which the remaining non-influenced population were murdered.

You reference an incident report then a few sentences later describe what happened in the incident. It takes away from the suspense/mystery.

destroy any “wildling” instance found

This might just be me being an idiot, but what is a 'Wildling' instance? Are they the ones in non-residential areas?

The remains of a human male and of a juvenile instance of SCP-!LG were located within the ashes.

Is this the incident? Why is it in the discovery log and not the incident report?

E. [redacted] and D. [redacted]

These characters don't come back for interviews and all we know about them is the first letter of their first name. I think "two survivors" will suffice, no need to name them.

Quarantine

I think this should be called "addendum XXXX-1" rather than quarantine, and also should be bolded with a colon after it.

Field Researcher @RSName has been assigned to SCP-!LG.

A character gets introduced right at the end of the story for no real reason. Without this I'd assume the Foundation were researching the phenomenon, this seems unnecessary.