What monsters are aggro to what monsters?

[Lyrinn]

There's a FATE near Urth's that spawns a giant boar boss, and if I remember correctly, it will aggro onto and kill any of the boars that are normally around there. Only reason I remember it is because it was a nuisance for my boar hide farm runs.

[Brine_Gildchaff]

There's a FATE near Urth's that spawns a giant boar boss, and if I remember correctly, it will aggro onto and kill any of the boars that are normally around there. Only reason I remember it is because it was a nuisance for my boar hide farm runs.

Yup, Phecda, boss of the What Gored Before FATE. The Sylph beast tribe quest FATE What A Bore also spawns a bunch of smaller boars that all attack the boss. And then Simurgh is the Word actually has a "Lone Coeurl" that engages the boss at the start of the FATE, though it usually dies really fast. I only saw it myself because I was at that spot waiting on the FATE for a hunt daily.