Shortly after the Treaty of Thronehold, a handful of brilliant warforged pledged a secret union to right the unbalanced force of magic. The Last War made one thing clear to these warforged - magic has become perverted into little more than a weapon used to enslave, kill, and ruin.
These warforged established the Eldritch Crucible to ensure magic's future implementation as a tool instead of a weapon. The crucible sees House Cannith as their greatest foe, working against the house's war profiteering nature.
Perhaps the direst secret of the Eldritch Crucible's masters is their dark plan of self-destruction. The highest echelons of the crucible's leadership plan to commit mass suicide once the lion's share of potent magic weaponry is accomplished.