Masuta the Ascended

Masuta the Ascended is the second boss of the Temple of Aminishi elite dungeon.

Mechanics
He has 550,000 health, uses all three forms of the combat style and has three phases.

In phase 1, Masuta attacks with melee against his primary target and ranged against other players. Like the brothers in Barrows: Rise of the Six, he can perform a hurricane attack that deals high, rapid melee damage; while the game shows him as walking, he is still running and can damage players. For this reason, the tank should have a shield and use Devotion, Barricade or Reflect until the attack is over; it lasts roughly 15 seconds. He can also create images of himself which roundhouse kick all players, with those next to him taking multiple hits from both the clones and himself. He can also conjure purple mist in the area that deal high magic damage upon exploding. He may also shout "I'll pulverise you!" and use the Pulverise ability, dealing melee damage, but unlike the player's Pulverise, Masuta's does not seem to reduce the player's damage output. Continue damaging Masuta until he reaches 50% of his health.

In phase 2, Masuta levitates above the ground and gains a massive damage reduction, but stops attacking players. During this time, he continuously summons thrashing waters; each one has 8,000 health, attacks with rapid magic attacks, and has a very long attack range. Being near a thrashing water when it is destroyed grants a 5% stack to a "calm waters" buff that can reduce damage taken from Masuta in the next phase. Keep destroying them until Masuta stops levitating and resumes attacking players.

In phase 3, Masuta stops using melee and begins using rapid ranged attacks that deal 1500-1900 damage. After every 3-6 ranged attacks, he uses a powerful magic attack in the form of a large wave of purple energy that can deal over 8000 damage. It is signalled by him using the Meteor Strike animation: he leaps into the air before crashing back down. Players should keep their health above 8000 at all times; the magic attack can be unpredictable and gives very little time to change prayers. It is recommended to use Protect/Deflect Magic and Debilitate for this attack, though one can use Resonance to fully heal from this attack.

Once he is killed, a hidden staircase reveals itself.

Drops
Two drops are rolled; the 100% drop and a common mob drop.

100% drop
Masuta drops onyx dust, unless his warspear, ancient scale or Himiko's Vision is dropped, which replaces the dust.

Trivia

 * 'Masuta' (マスタ) is 'master' written in minus the long-vowel mark.
 * There is a glitch where all kills regardless if solo or group attempts is doubled, so one Masuta kill would end up being two.