Ember/herb Cave New Mob?

Inside the herb cave where all the ender spawns are theres this lizhardangatam flower with 23k health that respawns instantly after i kill it, it does crazy dmg
t wasnt there before, is that why i see barely anybody in herb cave as before
if so whats the new grind spot

 

they nerfed pretty much every grind spot in some way, either by nerfing their xp, removing it entirely, or adding more powerful mobs (in this case)
herb cave is still a pretty good grind spot at-level, but you probably might need to organize/find a party in order to survive.