I think it's anything that needs to be subdued, or anything that has an anger cycle.
Greater Dragons, Dragons, Night Mares, Hiryus, Lesser Hiryu, Rune Beetles, Bake Kitsune, White Wyrms, Giant Beetle, Ice Worm, Swamp Dragon, Fire Beetle, Fire Steed.
And... I'm not sure which ones get their Dex halved, maybe all?