The Woldwrath’s animus reads something like the following:
Druid’s Wrath- Friendly faction models gain boosted magic attack rolls when targeting enemy models within 10” of this model.
So yeah, he's always going to be fielded with Druids. Hopefully, the Woldwrath's got magical rather than ranged attacks. Going to be seeing this guy fielded with Gallows Groves and maybe a Woldwarden too; if it doesn't have Geomancy itself.
And Wayfarers too come to think of it. Critical knockdowns for everyone!