Kraken

Kraken is a kind of monster which live in sea. It looks like a giant squid in Tara's Notes (see picture). They may be considered as one kind from many kinds of monster which very rare in nature, due Tara cannot obtain any essence of this monster after many years searching.

Not much known about this monster. To date, Sam and Dean have never encountered an actual kraken. However, Crowley stated if he has a warehouse full of this in Belize. It's unknown if Kraken lived and can be found abundantly here.

It's essence is one of many ingredients (and also the last ingredient which acquired) to performed First Blade locating spell.

Background
After gathering information from demons about the Knights of Hell and the First Blade, Tara attempted to seek the weapon. However, after years of fruitless searching, she was only able to find a tracking spell and gathered all but one of the ingredients, essence of Kraken. However, when Dean and Crowley arrived, Crowley was able to get the final ingredient from his own warehouse in Belize and they can performed the spell to locate the blade. However, the spell actually tracked the source of the Blade's power, which was the Mark of Cain, as the Blade itself was thrown into the ocean (later, it's known that the blade was thrown to Marianas Trench).

Appearance
First Born (Mentioned only)
 * Season 9