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 map event that summons a random Prime Evil who drop Worldstone Shards (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. 
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."

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

--

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:

Set 1:

    2nd Ingredient: Infernal Core (Drops from all demons)
    3rd Ingredient: Shard of Chaos (Drops from a map event summoning a random Prime Evil)

Verse:

From ashes where annihilation hides,
Extract the core where inferno resides.
In shattered echoes where chaos dwells,
Unveil the path to the shadow that fell.

Set 2:

    2nd Ingredient: Demonic Essence (Drops from all demons)
    3rd Ingredient: Fragment of the Abyss (Drops from a map event summoning a random Prime Evil)

Verse:

Within the void of extinguished light,
Seek the essence of demons' might.
Find the fragment the abyss concealed,
And summon the force that fate has sealed.

Set 3:

    2nd Ingredient: Cinder Soul (Drops from all demons)
    3rd Ingredient: Echo of Destruction (Drops from a map event summoning a random Prime Evil)

Verse:

Annihilation's ember holds the key,
Harvest the souls from cinders set free.
Listen for echoes where destruction roams,
Unlock the gate to the forsaken throne.

Set 4:

    2nd Ingredient: Diabolic Ichor (Drops from all demons)
    3rd Ingredient: Splinter of the Worldstone (Drops from a map event summoning a random Prime Evil)

Verse:

In shadows cast by annihilated flame,
Draw the ichor that bears no name.
From splinters torn of the Worldstone's heart,
Awaken the ancient to rend apart.

Set 5:

    2nd Ingredient: Infernal Residue (Drops from all demons)
    3rd Ingredient: Remnant of Corruption (Drops from a map event summoning a random Prime Evil)

Verse:

From the remnants where annihilation lies,
Gather the residue beneath hellish skies.
Seek the remnant that corruption left behind,
And face the eminence beyond mankind.

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Ingredient Set 1

    Second Ingredient: Infernal Core
    Third Ingredient: Shard of the Fallen

Verse:

Veiled within the abyss's embrace,
Essence drawn from shadows' trace.
Gather fragments where titans weep,
Embrace the night their secrets keep.
Ingredient Set 2

    Second Ingredient: Demonheart Fragment
    Third Ingredient: Eclipse Shard

Verse:

From depths where crimson echoes dwell,
A broken heart the darkness swells.
Seek the twilight's hidden gleam,
Where light and shadow intertwine their scheme.
Ingredient Set 3

    Second Ingredient: Abyssal Vein
    Third Ingredient: Obsidian Shard

Verse:

Beneath the stars' forgotten glow,
Flows the vein where nightmares grow.
Harness stone from voids untold,
Forge the power from depths of old.
Ingredient Set 4

    Second Ingredient: Shadow Essence
    Third Ingredient: Prime Shard

Verse:

In twilight realms where whispers sing,
Darkness holds its eternal spring.
Collect the prime from chaos' reign,
Bind the curse, unleash the bane.
Ingredient Set 5

    Second Ingredient: Nether Shard
    Third Ingredient: Worldstone Fragment

Verse:

From realms where light and dark collide,
A shattered piece the voids provide.
Traverse the lands where evils roam,
Restore the balance, summon home.