Naraka

HP at Demonsbane Stage 1: 27,000,000,000

HP at Demonsbane Stage 2: 210,600,000,000

HP at Demonsbane Stage 3: 486,000,000,000

HP at Demonsbane Stage 4: 1,053,000,000,000

HP at Demonsbane Stage 5: 1,879,200,000,000

HP at Demonsbane Stage 6: 2,889,000,000,000

HP at Demonsbane Stage 7: 3,612,600,000,000

Please note that the Supreme effect increases the boss's maximum HP, so the HP values listed here may differ from those you see in-game.

Swipe: Naraka swings its spear toward its target two times.
Front/Back Smash: Naraka strikes toward its target once, then strikes to its rear. The first hit inflicts knockback, and the second inflicts knockdown.
Ceaseless Swipe: Naraka swings its wings covering a 270° area, then strikes once to its rear and once toward its target. The first hit inflicts knockdown, and the second and third hit inflicts knockback.
Serial Pierce: Naraka strikes toward its target once, then rushes in the direction of its closest target, excluding the tank. Both hits inflict knockback.

Thorn Spin: Naraka spins twice to attack toward all angles. The second hit inflicts knockdown.
Great Spin: Naraka shields itself with its wings, then spins once to attack toward all angles. The hit inflicts knockback. To stop the attack, use a joint technique.