The Star Sentry takes 1❁ Damage per hit, regardless of the Accessories, Weapons, or Armor used. They do not take ❁ Damage from a weapon's ThunderlordEnchantment, requiring the Star Sentry to be hit 10 times.
While idle, they will wander around the Fallen Star they were spawned by, only attacking and following the player if they are within 5 blocks of them. They are quick to lose aggression if outside that range.
Trivia[]
The internal name of this mob is "Crystal Sentry".