One of the bosses from Heart of Fear will be standing near the front steps leading to the raid entrance:

• Garalon
• Wind Lord Mel'jarak
• Blade Lord Ta'yak
• Amber-Shaper Un'sok
• Imperial Vizier Zor'lok

Two of these at random will be available along the flight path:

• Amber Earthshaker is an amber rock giant west of Kypari Ik on top of the cliff.
• Amber Rocktunneler is a huge gyreworm located in the portal southeast of Kor'vess.
• Amber Venomlancer is a huge scorpion on the opposite side of the road as Kypari Ik.
• Dread Ambercrusher is a whitish-grey rock giant in front of the steps leading to the Heart of Fear.
• Dread Fearbringer is a purple rock giant is just south of the entrance to the Heart of Fear. (The Dread Fearbringer mobs sometimes patrolling near the Serpent's Spine do not give credit.)
• Essence of Dread is a sha found in the portal near Kypari Ik.
• Essence of Fear is a sha found in the portal west of Kypari Vor.
• Essence of Horror is a sha found in the portal just to the east of Heart of Fear on the southern path.
• Essence of Panic is a sha slightly east of Kypari'Ik, on a northern ledge looking downward.
• Essence of Terror is a sha in The Clutches of Shek'zeer (just opposite the "road" from the Heart of Fear front steps).

If you want to add these to _NPCSCAN, copy and paste these lines into chat, or try placing the ones you need into a macro:

/npcscan add 63667 Garalon
/npcscan add 63665 Wind Lord Mel'jarak
/npcscan add 63664 Blade Lord Ta'yak
/npcscan add 63666 Amber-Shaper Un'sok
/npcscan add 63662 Imperial Vizier Zor'lok
/npcscan add 65456 Amber Earthshaker
/npcscan add 63638 Amber Rocktunneler
/npcscan add 63619 Amber Venomlancer
/npcscan add 65435 Dread Ambercrusher
/npcscan add 65439 Dread Fearbringer
/npcscan add 65491 Essence of Dread
/npcscan add 65487 Essence of Fear
/npcscan add 65490 Essence of Horror
/npcscan add 65489 Essence of Panic
/npcscan add 65488 Essence of Terror