A Mammoth Undertaking[Q12607] needs support for bridle,capture and turning in the mammoth.
I found some of the spells and videos... :)

 51659  Apply Harness [Server Side Script]
 51658  Ride Shattertusk Mammoth
 51660  Hand Over Mammoth

Video
https://www.youtube.com/watch?v=HY_0xsTXAHg
https://www.youtube.com/watch?v=erz199aOdi8