Perhaps you will be interested
The Grand Black War Mammoth can drop from all the bosses in the Vault of Archavon on all modes. The rop rate is very low (1% - 2%). It can also be listed on the Black Market Auction House.
Here you can buy Grand Black War Mammoth for EU or US Servers.
You'll get guide for getting Grand Black War Mammoth
You'll be able to get Grand Black War Mammoth
Grand Black War Mammoth mount
In Dragonflight service now is possible to do with lvl 1 characters.