The Castle is one of the Lesser Sons that can spawn near the Fortresses as a miniboss. Created by Kacperlupa.polska.
The Castle is bigger, orange Bastion with shorter lances on sides and spawner on back.
- Impale!!!: He will charge very fast at one player.
- Castle's Guardians: Eight Drones will be pumped from back spawner to chase tanks.
- Swords shall slash...: He zips to the nearest tank and after 0.5 second he slashes them with his lances. Inflicts Bleeding for 30 seconds. If above 40% of HP, zips away from the victim.
- ...And tanks shall break!: Zips to another player and stabs them with lance, which does heavy damage and inflicts Broken for 15 seconds. Used only after "Swords must slash..." and below 40% HP.
- Castle Guardians Neo: When he has 15% of HP, he turns Invulnerable and pumps up five Minions, which are Basic Tank's upgrades from normal Diep.io. They are strong. After that, he is now vulnerable and has Broken debuff for the rest of fight.
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