Blue Armored Bones

Type	Undead Enemy
Environment	Dungeon
AI Type	Fighter AI
Banner	Blue Armored Bones Banner
Immune to
Debuff	Broken Armor
Debuff tooltip	Defense is cut in half
Chance	50%
Duration	10 seconds20 seconds
Coins	1025
Hurt	https://terraria.wiki.gg/wiki/File:NPC_Hit_2.wav
Killed	https://terraria.wiki.gg/wiki/File:NPC_Killed_2.wav
Idle	https://terraria.wiki.gg/wiki/File:Zombie_0.wavhttps://terraria.wiki.gg/wiki/File:Zombie_1.wavhttps://terraria.wiki.gg/wiki/File:Zombie_2.wav

Blue Armored Bones are post-Plantera Hardmode enemies that spawn in the Dungeon after Plantera is defeated. Similar to Angry Bones, they come in multiple forms, follow the Fighter AI, and can open doors after a few hits. Blue Armored Bones have a 50*1/2 (50%) chance to inflict the Broken Armor debuff for 10 seconds / 20 seconds.

They are much more likely to spawn in Dungeon areas with Brick Walls, as indicated by the Marching Bones Banners present within these sections.

Variants

Classic

Expert

Master

2 values: Pre-Hardmode › Hardmode
3 values: Pre-Hardmode › Hardmode › Post-Plantera

NPC ID		Health	Damage	Defense	KB Resist
273	Blue Armored Bones	500/1000/1500	45/90/135	50	85%/87%/88%
274	Mace Blue Armored Bones	350/700/1050	65/130/195	34	60%/64%/68%
275	No Pants Blue Armored Bones	550/1100/1650	45/90/135	50	85%/87%/88%
276	Sword Blue Armored Bones	500/1000/1500	85/170/255	54	80%/82%/84%

Notes

The Sword Blue Armored Bones deals by far the most amount of damage out of all armored bone variants.
In the Getfixedboi and Don't dig up Secret world seeds, Blue Armored Bones will drop the Katana instead of the Keybrand.

Trivia

The Bestiary entry for the Blue Armored Bones: "Disciplined and relentless, the Marching Bones unceasingly pursue their goals, sundering anything, or anyone, in their way."