Vy'drach

The Vy'drach, also nicknamed the Phoenix, is a winged beast inhabiting the radioactive infernal deserts of Yautja Prime, surviving radiation strong enough to kill most life forms.

In Yautja Culture
As a rite of passage, every aspiring Yautja Spear Master must kill a Vy'drach while armed only with a spear. If the Yautja kills the Vy'drach, its hide is fashioned into armour which its nemesis wears for life. Like the Vy'drach itself, this armor is highly resistant to fire, electricity, and radiation.