Siege Monstrosity

HUNTERS, you can start taming them even if the rider is on them. The rider will just jump off and start attacking you once you've tamed it.

These can be affected by [spell=111673], which makes for a huge undead pet

The following is copy/pasted verbatim from Tanisll's comment over on [npc=139709]'s page. Go over there and give that comment some upvotes too, if it was helpful to you! Presumably, these stomp sound IDs should all be the same, since these are the same model of dinosaur.

If you love the Risen Gargantuan pet but can’t stand the constant heavy stomping noise, you can silence it completely.

Step 1 – Get the stomp sound IDs
Normally you’d have to log them yourself with a sound ID addon like SoundID Locator, but I’ve already done that work. These are the stomp sound IDs:
803475
803477
803479
803481
803483
803485
803487
803489
803491
803493

Step 2 – Mute them
Install the MuteSoundFile addon. For each ID above:
• Enter the number in the “Sound ID (number)” field
• Click “Preview this sound” to confirm it’s the correct stomp sound
• Click “Mute this sound”
Repeat for all IDs.

Step 3 – Enjoy the silence
Once all 10 are muted, the Risen Gargantuan will walk quietly, no more ground-shaking thuds.