Jarl

Originally we learned of the Jarl by speaking to a dead Goblin.

it said there was something in a giant cave.

After we defeated the Bodak at Riverbend some Goblins and a ogre took over the town.
They were all chanting the same thing like they were under a spell. Something including Gathering men and horses for Rodeo, and a Prophesy?
The goblin we spoke with said there was a Jarl in the Giant Cave - possibly a Giant
Goblin Chant:
"Goblins fair and Goblins green
Guided by their ogre queen
Make a show where all will go
The greatest goblin rodeo"
"Fetch them horses fetch them men
Catch and snatch and prey again
This be true, because of me
My latest greatest prophecy"

Snake Chant
"Fetch them horses fetch them men
Catch and snatch and prey again
This be true, because of me
My latest greatest prophecy"
"Speak, oh shining wyrm of black
Whisper sweets and speak of snacks
Crave the cakes of liver make
A sweety meaty baker-ay"

Later in Pennislovica on the boat between Duskford and Castle Frey we saw a Giant Snake trying to kidnap a child. Kin looked into its mind to find someone else was already controlling it, it was also chanting something about gathering people and eating livers - something about a large Wyrm. The being controlling the mind of the snake noticed the power being taken away by kin, and laughed - a big boisterous laugh.

We encountered giant creatures in the Taste Tree Forest who were also rhyming things like this. the giant gorilla mentioned there was a curse on the woods, and they did not want us the break it.

The goblins said the Jarl was in a Giant place.