Highest level is the alpha once ten show up eventually the alpha will howl summoning the reaper king

You can find them in the lower caverns. They have an almost endless spawn and grow mutate to an alpha when the previous alpha dies. Have a charge pet like bulbdog if you want to avoid.

1. Light Burns These Creatures
2. 10 Will Spawn a Reaper
3. If you want to obtain their venom, kill a lot of nameless and eventually, one will drop 2 venom

The nameless toxin, dropped by the nameless alphas, reaper kings, and reaper queens, are used as the wyvern milk for wyverns, but for the mighty Rock Drakes as the main thing to feed the juveniles.

Nameless?
More like Endless...