Crinos

To all Fera, the Crinos is the war-form, fusing the deadliest aspects of human and beast into one body whose sole purpose is to kill and shredd all enemies of Gaia into pieces. When a shapeshifter assumes this form, it shows that the time for negotiations is over. Nearly all Fera inflict Delirium when wearing their battle-form.

All Metis regardless of their species are born into their crinos form and consider it as their natural form.