Weakness Meme || Accepting!
While Xiro is particularly weak to cold iron, he can also be harmed by the same things as humans. You fill him with enough holes, he will die. He can be hurt, and can and will bleed. However, he can heal from these wounds exceptionally fast. What would take a human weeks to heal can be rectified within a few days or even a matter of hours.
The surest and quickest way to take him down and make him stay down for a good while is by using cold-forged iron weapons. It will burn him severely at the merest touch, render his powers inert for as long as the iron is in contact, and he cannot recover from these wounds as quickly. If subject to too much iron, he will die a slow, agonizing death.