Sentinel

Appearance
A player will encounter Sentinel when they pick the 'Boss' in a level one choice room or encounter it randomly in level one.

Behavior
Sentinel has two stages. Each stage has two unique attacks. For the first stage of Sentinel, it will either shoot out homing bullets from the nodes on its protective layer or it will fire a short wave of bullets while spinning. The amount of homing bullets that are shot out is based upon the amount of nodes on its protective layer (it has a total of four.) Once the player knocks down its protective layer, it will immediately fire a large wave of bullets in all directions. Once that attack is over, it emits are large laser from its eye that spins counter-clockwise. If the Boss is not dead yet it will stay sill for a couple seconds and then spikes will appear all over its body and it will charge at you. The Boss will then repeat this cycle starting from spinning counter-clockwise and shooting bullets in every direction.

Strategy
Try to keep your distance during attacks, but after an attack the boss has a cool down so take that time to damage its nodes on its protective layer. On its first stage, when it shoots out homing bullets, try to dodge past them while keeping your cursor on the boss, for extra damage. During its small wave of bullets, try to shuffle between them. Once the second stage of the boss starts, prepare for its large wave of bullets. They go in every direction, so try to stay in front of it and shuffle between bullets. If you are diagonal, it's much more difficult to shuffle between bullets. During its laser attack, you want to time your dodge early because the laser it fast. After you dodge try to dash backwards so that you can stay in the same place. When it charges at you with its spikes dash to the side and shoot it before it shoots bullets everywhere. You can tell when it will charge at you when its eye fixes on you.