Grindkore

Grindkore is a new boss in BTDP. It has 15,000 health and 4 Auracrysts, giving it a total of '''75,000 health! '''But that's not even the most powerful part...

Appearance
Grindkore appears as a boss in Chapter 4, "Into the Unknown". The monkeys are walking through an abandoned bloon temple, but suddenly the entire building starts shaking and Grindkore flies in. Its appearance is a stone bloon with diagonal green stripes on it, and 4 "arms" on every side of it. Every "hand" is holding an Auracryst. Grindkore's Auracrysts look different from normal ones, they have sharper edges and are have blood all over them. Wondering why they have blood on them? You'll find out...

Abilities
Grindkore's 4 "arms" are constantly spinning extremely fast. This means that any towers too close to it will get grinded up by its Auracrysts. It also has some abilities:

Auracryst Heal: Grindkore and its Auracrysts are all healed by 500 HP.

Auracryst Boost: For 5 seconds, Grindkore's Auracrysts stun towers for 3 seconds, do double damage, and take 15% less damage.

When Grindkore goes down to 20,00 health, Auracryst Boost is constantly active.

Backstory
In the early days of bloons, after the ceramic bloons had just been invented, the bloons realised that ceramics were not strong enough, so they created a new bloon they called the Stone Bloon. However, the bloons realised that Stone bloons weren't even strong enough, so they created the MOAB. The Stone Bloon was never used and wished that it could help fight the monkeys, but it was always told it wasn't strong enough. One day, the Stone Bloon was at the Bloon Lab, and it noticed something green and sharp. The Stone bloon tried to pick it up, but it didn't have hands like some other bloons, so it couldn't. The stone bloon really wanted the green thing, so it invented robot arms for it to use. It picked up the green thing, and became filled with power. It wanted more, so it made 3 more robot arms and got 3 more Auracrysts (which it now knew that they were called that). When the bloon leaders saw how powerful it was with the Auracrysts, they let it fight the monkeys and started giving Auracrysts to other bloons.