Brushtail Codex

The Iron Warden is a terrifying autonomous sentry-heavy knight equipped with thick, bulky magic armor and wielding a spell-woven two-handed axe under the direct command of Haywire.  The blades of this axe are pure arcane energy being cycled through a crystal gem embedded within the eye of the axe.

Its slow, lumbering movement when in defense mode is menacing and becomes truly terrifying when most attacks simply bounce off the armor, allowing hulking beast to remain flinchless.

When its target is found, it will go into attack mode and pursue relentlessly until the threat is subdued or taken care of.

The Astral Scholars call the piece of magical engineering "a gemstone golem with a brain and a giant axe!"