Poem to Find the Three Weapons: Wave, Whelm, & Blackrazor

Poem given to the 3 weapon owners:

Search ye far or search ye near
You'll find no trace of the three
Unless you follow instructions clear
For the weapons abide with me.

North past forest, farm and furrow
You must go to the feathered mound
Then down away from the sun you'll burrow
Forget life, forget light, forget sound.

To rescue Wave, you must do battle
With the Beast in the Boiling Bubble
Crost cavern vast, where chain-links rattle
Lies Whelm, past water-spouts double.

Blackrazor yet remains to be won
Underneath inverted ziggurat.
That garnered, think not that you're done
For now you'll find you are caught

I care not, former owners brave
What heroes you seek to hire.
Though mighty, I'll make each one my slave
Or send him to the fire.