Try the new mode of the wither storm it's much more interesting than the one in this video he may even have a chance because there is the final phase with the three three-headed wither maybe he will defeat herobrine
U should do herobrian vs herobrian because if herobrian is strong means he need to fight him self so please hearth my comment I didn't get my first hearth
Actually these could just be coded into the games, and she could've made the mods herself and probably are just for experimental and just for the videos, because coding for mobs to do this is very hard. So, more likely she won't release this, till she's like fully done, because you can tell there's a bit of glitches she has to fix. If these were actual mods, these would've been found already.