History of Behemoth Bash

Behemoth Bash is a triumph with the in-game text: "Complete matches. Bonus progress for matches completed using the Behemoth." Its objective is Matches completed (0/3).

How to complete

From the game text only: finish 3 matches, with bonus progress for matches played as the Behemoth Titan Stasis subclass. This reading is an inference, since "the Behemoth" could in principle refer to something else.

Unconfirmed

I found no guide for this triumph. The Heavy Metal title guides I opened do not list it, so it does not appear to belong to that title. Which playlists count, and its season or seal, are unconfirmed.