There is no fast way other than to keep killing cockatrices, I must have killed over 1,000's of them and not one has dropped for me either.
Chat with our AI personalities
You don't you actually use it to make a spirit cockatrice puch.
The important thing is to carry a mirror shield with you. Otherwise, the cockatrice will quickly lower your combat stats. You can buy a mirror shield from any slayer master, or from the Grand Exchange.
kill chickens when you have the quest, it will drop fast
There are no RuneScape cheats. You can buy black armour on the Grand Exchange, or (in parts) in different specialized armour shops.
There is no emotion that does that, it's a light-bulb.