also,
Feral Bobcats have +2 Charge.
Beastmaster has a bow and Ranged +1, and fast.
Bobcats all get +2 Melee for running into the targets square and attacking. (and another +1 each if its wounded prey)
If the opponent, who is hindered, tries to chase the beast master (who is fast and keep kiting) all of those bobcats will get another +2 attack dice each when they follow him into the next zone.
On the other hand, if the opponent stands in teh zone and tries to fight off the bobcats, you get to keep shooting with your hunting bow, which is getting an extra bleed chance and pierce because of the animal attacks.
Charge trait has a lot of synergy with a mobile or ranged mage, because in order to chase the mage you have to let the creatures keep getting their charge bonus.
---edit
Wait.. I just realized that by "who has that?" you might mean, who physically has that in terms of copies of the cards.. since the core set only comes with 2. (which means the alternate BM build would require having bought tomes or another core set.)