NCF – Extended list of Neutral creatures.

Actually, in Heroes 3, Horned Demons and Demons butt heads, so if animations can be extracted from there, that's fine.

You did make animations for the Black Knight somehow, after all)

For this ability, it seems to be here:

<AnimCharacter href="/Characters/Creatures/Dungeon/Maradeur.(Character).xdb#xpointer(/Character)"/>

Это отсылает на 
<AnimCharacter href="/Characters/Creatures/Dungeon/Maradeur.(Character).xdb#xpointer(/Character)"/>

А оттуда по ходу сюда:

<Item>
	<Kind>specability</Kind>
	<Anim href="Maradeur-arena-specability.xdb#xpointer(/BasicSkelAnim)"/>
</Item>

Perhaps you could make a custom Lizard Bite by analogy with this