Rock-on

Rock-on is a boss found in  Rescue in Ingall's Mine, the Ingall's Mine Hazardous Ruin's Upper Level (Level 1), and the Deepest Ruin.

Spawning
Level 38 Rock-on is fought as a boss during Rescue in Ingall's Mine and on the Upper Level of the Ingall's Mine.

Both level 38 and level 45 Rock-on has a chance to appear as a boss in the Deepest Ruin.

Behavior
Rock-On has a multitude of attacks it can levy against the Builder. All but one of its attacks hit multiple times, so it is imperative to escape before the Builder takes too many hits.

All of these attacks can be used at the beginning of the fight.
 * Firstly, when in very close range, Rock-On will attempt to drill the Builder.
 * Secondly, It has a medium range arm swipe attack, where its arms are covered in electric currents. Unlike Rock-On's other attacks, this attack only hits once, but hits for rather high damage.
 * Thirdly, Rock-On will do a horizontal spin attack, which hits a great number of times. It is advised to avoid going near Rock-On when it is using this attack.
 * Lastly, Rock-On will do a vertical spin attack. However, just because it is spinning vertically, does not mean it will not turn to face the Builder in this state. Just like the other spin attack, this one also hits many times, and it is also advisable to avoid Rock-On when it is doing this attack.

Trivia

 * Stunning the Rock-on results in electricity circulating around its legs, hurting the player.
 * Attacking the Rock-on's legs does no damage.
 * During Early Access, the Rock-on was known as the Digger AI.