Say, does an ancient stegadon considered as a taking a rare slot when mounted by a chief? And the priest with the eotg? I'v browsed the forum looking for answer but didn't find one...
No it doesn't take up rare/special slots...Otherwise it would have stated so, like a dragon, or such...
Nope, that was from the old army book. 7th ed. Lizardmen mounts doesn't take more slots than the character riding it took. I'm fairly sure that even goes for all the special characters.