In season 4, Project Diablo 2 introduced a new boss - Rathma. And before releasing the ingredients for the fight, they posted this short verse:

The Ode of Rathma

Hidden from the brightest flame,
The dead remain to speak His name.
Rob the shadow to splinter His light,
turn your soul evil and conquer the night.

Then it turned out that:
"the brightest flame" meant Hellfire Torch
"The dead remain to speak His name" meant Trang-Oul's Jawbone that drops only from undead monsters
"Rob the shadow to splinter His light" meant Splinter of the Void that drops from a certain map event
And 4th line probably refers to the nature of Rathma, he's an evil necromancer. 

Now, in season 10, they're introducing another boss, that we don't know the name of yet. But we know that it's a powerful demon or a fallen angel from Diablo lore, who hasn't been featured in other Diablo games, possibly Lucion, so just keep that identity in mind. The boss might use curses and lightning spells, but it might also not.
We don't know what the ingredients will be, but the speculation so far is:
Annihilus or Annihilus ash (1) + some ingredient that only drops from demons (2) + some shard that drops from a Dark Wanderer map event that summons a random Prime Evil that drops Worldstone Shards, which is prephrased with "Darkness itself wanders these lands..." (3)
The 2nd ingredient should not be an actual item from the game, but some miscellaneous item, like an organ or a piece of a demon's body or an essence. All demons would be able to drop it, so don't make it too specific like a feather, not all demons are birds, for example.

What I want from you is to come up with the names of the 2nd and 3rd ingredients and write a verse similar to above for each ingredient set. Make it like 5 possible ingredient sets / verses.

The ingredients and the boss name should not be explicitly mentioned in the verses. Don't mention demons explicitly either. Also, things like "annihilation" would be too obvious probably, better use some of its characteristics. If you don't know what Annihilus is and how to incorporate it into the verses, this might help you:
"The Annihilus is a unique Charm dropped by Uber Diablo.
This item uses the sprite for Mephisto's Soulstone, despite a sprite for a red-colored "Diablo's Soulstone" having existed in the game at the time of creation which could have given it a more unique appearance.
It's like a blue shard. But it can also be red when corrupted. And you can break it into ash."

These ingredients already exist in the game, you can follow the theme, but obviously don't reuse them: Prime Evil Soul, Black Soulstone, Pure Demonic Essence, Voidstone, Splinter of the Void , Trang-Oul's Jawbone, Hellfire Ashes or Hellfire Torch

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I also asked other AI assistants to do the same and here are their verses. Go through all of them, yours and theirs, rank them and pick the best ones. Maybe you can even improve some of them.

Set 1:

    Second Ingredient: Demonic Heart (Drops from all demons)
    Third Ingredient: Shadow of the Wanderer (Drops from the Dark Wanderer map event)

Verse:

Where the ashes of oblivion lie,
Claim the heart where demons die.
From shadows cast by a wanderer's stride,
Unleash the power that darkness hides.

Set 2:

    Second Ingredient: Abyssal Eye (Drops from all demons)
    Third Ingredient: Whisper of Dusk (Drops from the Dark Wanderer map event)

Verse:

In the remnants where extinction sleeps,
Seek the eye from abyssal deeps.
Heed the whisper at twilight's end,
Awaken the force that shadows send.

Set 3:

    Second Ingredient: Nether Essence (Drops from all demons)
    Third Ingredient: Fragment of Night (Drops from the Dark Wanderer map event)

Verse:

Within the void where silence dwells,
Gather essence from nether spells.
Find the fragment torn from night,
Unlock the gate to forbidden might.

Set 4:

    Second Ingredient: Infernal Horn (Drops from all demons)
    Third Ingredient: Echo of the Lost (Drops from the Dark Wanderer map event)

Verse:

Amidst annihilation's quiet breath,
Seize the horn of infernal death.
Echoes of the lost resound,
Unveil the path to depths unfound.

Set 5:

    Second Ingredient: Demon's Claw (Drops from all demons)
    Third Ingredient: Veil of Shadows (Drops from the Dark Wanderer map event)

Verse:

From ashes cold where endings meet,
Claim the claw from demons' defeat.
Lift the veil where shadows lie,
Summon the force from a forgotten sky.

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Ingredient Set 1

    Second Ingredient: Infernal Essence (Drops from all demons)
    Third Ingredient: Shard of Nightmares (Drops from a map event summoning a random Prime Evil)

Verse:

Where oblivion's touch leaves a silent mark,
Gather essence from fires that devils spark.
In dreams where ancient terrors reside,
Unveil the path where shadows collide.

Ingredient Set 2

    Second Ingredient: Demon's Blood (Drops from all demons)
    Third Ingredient: Echo of the Prime (Drops from a map event summoning a random Prime Evil)

Verse:

Hidden where endings meet their start,
Seek the blood from demons' heart.
Listen close to echoes bygone,
Awake the force that time forgot upon.

Ingredient Set 3

    Second Ingredient: Unholy Residue (Drops from all demons)
    Third Ingredient: Fragment of Desolation (Drops from a map event summoning a random Prime Evil)

Verse:

Among the ashes where worlds decay,
Find residue from unholy fray.
Collect the fragments of desolate lands,
Reveal the fate that destiny demands.

Ingredient Set 4

    Second Ingredient: Abyssal Fragment (Drops from all demons)
    Third Ingredient: Whisper of the Void (Drops from a map event summoning a random Prime Evil)

Verse:

In darkness deep where no light slips,
Find the fragments from abyssal rifts.
Heed the whispers the void imparts,
Unchain the power sealed in hearts.

Ingredient Set 5

    Second Ingredient: Shadowed Core (Drops from all demons)
    Third Ingredient: Essence of Chaos (Drops from a map event summoning a random Prime Evil)

Verse:

Beneath the eclipse where light withdraws,
Retrieve the core embraced by shadows' claws.
Harness the essence where chaos unfolds,
Unlock the secrets that the abyss holds.