I was just updating my monster manual for the Ancient Lands and found a note that I still need to write stats for the Sand Bision.
I have no idea what a sand bison is.
The next item on the list is a Riding Goat, so it’s probably some kind of actual bovine, but I havn’t the slightest clue what I could have meant with the name. There aren’t even any deserts in the Ancient Lands!
Update: I believe I simply meant an upsized version of the regular old musk ox.