can not disobey order from creator or imprinter nor attack them even if given the order

once per long rest can go into sentry mode which gives advantage to all range attacks and resistant to all melee attacks take bonus action to revert back or change

if you go down you will make no saving throws instead you will need to replace a metal heart and go back to full health, or get hit with lightning damage and go back to one health and have one round of combat

bite

does double damge with any attack with bite

You have Resistance to Poison damage.You also have Advantage on saving throws to avoid or end the Poisoned condition.

You gain a +1 bonus to your Armor Class. In addition, armor you have donned can’t be removed against your will while you’re alive.

You don’t need to sleep, and magic can’t put you to sleep. You can finish a Long Rest in 6 hours if you spend those hours in an inactive, motionless state. During this time, you appear inert but remain conscious.

You don’t gain Exhaustion levels from dehydration, malnutrition, or suffocation.