World Boss Idea- Death Knight

The death knight is a skeleton [Level. 87] with diamond helmet, iron chestplate, Diamond leggings, Iron boots and iron sword called Soul sword.
HP: 150,000
Regen speed: 300 hp per 3 second

Spells

Warrior Challenge Melee Attack
Damage: 100%
KnockBack: 50%
The death knight knock back the closer enemy 4 blocks away

Unholy Flames Summon Spell
Damage: 40%
The death knight summon three zombies called Ghoul For 30 sec (The Ghouls have speed II Effect).

Necrotic Move Teleportation Spell
The Death knight Teleports to place 5-7 blocks away

 

What would this boss be for?
Typically if you're designing a boss mob it's a good idea to design a quest for it to occupy.

 

Well it's a good boss, but rename it since we already fought death himself.... Or he'll make it stronger and make it a hidden raid boss with sick loot

 

I feel like this needs a little more detail, and maybe a quest to go with.

 

sounds good but give it a mini-boss status if there is no dungeon mini-dungeon or quest for it

 

Cool Idea, In a dungeon or a Quest???