Beetle

Beetles are Summons created by Anub'arak whenever he is using a Basic Ability.

Beetles spawn randomly in one of eight possible locations around Anub'arak. If Anub’arak is attacking an enemy when a Beetle is spawned, the Beetle will also attempt to attack that target. If Anub’arak is not attacking anything when a Beetle is spawned, the Beetle will attempt to find a nearby target to attack. If an enemy Hero is close enough it will be prioritised. Beetles will attack and pursue a target found this way until that enemy dies, or the Beetles lose track of the target (through teleporting away, for example). Only then will the Beetles return to a lane.

Individual Beetles each add more damage to Anub'arak's Basic Attacks, which rapidly adds up as Anub'arak can consistently be surrounded by them. Defensively, Beetles also act as extra bodies to catch single-target skillshots such as Hook, indirectly increasing Anub'arak's and his allies' survivability. They also do a good job of tanking Minions, Structures, Mercenaries, and other things that would otherwise attack Anub'arak himself.