Manic Goddess - Annihilation

If the trojan horse doesn't drop(a skill-up for Odysseus) where do you get it?

A bit of correcting Cronos's skills
https://imgur.com/gallery/XhEDdBg

are you sure trojan horse only has 30m hp? It feels more like 300m

Now that we have symbol for no skyfall and leader change, all we need is a symbol for HP change, voids all damage, breaks void, and turn counter change.
Never mind, we have all of those now.

Worst boss skill set of all descends dungeon

Eris's skills

skill name - skill effects - when it's used

Preemptive skill set:
Discord of Contempt - Status shield for 999 turns
Fire of the Gods - Voids damage over 25 million for 999 turns
Invitation to a Complex Disorder - Leader is Reincarnated Minerva for 10 turns

While Eris is above 80%, she will have a "trial". Every turn for 9 turns she will use 1A, 1B, 1C, or 1D, and then after that she will repeat 1E.(Note that this damage will be halved, Minerva halves fire and dark damage)

God of Fire's Blowing - 71200 damage and buffs removed - 1A

Skill set 2 - 1B:
Fruit of Discord - Makes 4 bombs
Aggry* Competition - 71200 damage and picks orb to start with(similar to Myr's Time Warp)

Skill Set 3 - 1C:
Numerous Incineration - Makes 4 jammers and poisons
Cruel Dispute - 33820 damage and binds 3 subs for 2 turns

Skill Set 4 - 1D:
Hatred Rush - 42720 damage
Holding Aggregation - 35600 damage and skill delays team members by 0 to 2 turns.

Rage Eruption - 356000 damage - 1E

When Eris is below 80% but above 70%, she will have another "trial". Once she will use skill set 5. After that, every turn for 9 turns she will use 2A, 2B, 2C, or 2D, and then after that she will repeat 2E.
Note that she will keep doing the Hera trial and not switch back to the Minerva trial if you heal her above 80% HP by failing her combo shield.

Skill Set 5 - Will use once:
Invitation to a Complex Disorder - Leader is Hera for 10 turns
War of Spears - Absorbs damage 6 combos or less for 10 turns

God of Fire's Blowing - 35600 damage and buffs removed - 2A

Skill Set 6 - 2B:
The same as 1B but with Aggry Competition doing 35600 damage.

Skill Set 7 - 2C:
The same as 1C.

Skill Set 8 - 2D:
The same as 1D but with Hatred Rush doing 21360 damage and Holding Aggregation doing 17800 damage.

Rage Eruption - 356000 damage - 2E.

When Eris is below 70% but above 50%, she will have another "trial". Once she will use skill set 9. After that, every turn for 9 turns she will use 3A, 3B, 3C, 3D, or 3E, and then after that she will repeat 3F.

Skill Set 9 - Will use once:
Invitation to a Complex Disorder - Leader is Zeus for 10 turns
Unending Fire - 99% gravity

3A-3D are the same as 2A-2D.

Shade that Takes Away Light - Hard-blinds 10 orbs for 1 turn - 3E, Will use every other turn.

Rage Eruption - 356000 damage - 3F.

When Eris is below 50% but above 15%, she will enter her final "trial". Once she will use skill set 10. After that, she will repeat a cycle: 2 of 4A, 4B, 4C, 4D, or 4E, and then 1 of 4F, and then repeat.

Skill Set 10 - Will use once:
Goddess's Barrier - 75% shield for 99 turns
Invitation to a Complex Disorder - 42720 damage and leader is Hestia for 3 turns

4A is the same as 1A but deals 44500 damage.
4B is the same as 1B but Aggry Competition deals 44500 damage.
4C is the same as 1C but Cruel Dispute deals 42720 damage.
4D is the same as 1D but Hatred Rush deals 26700 damage and Holding Aggregation deals 19580 damage.

Dizzying Change - 42720 damage and 2 casino orbs are made for 2 turns - 4E

Invitation to a Complex Disorder - 42720 damage and Leader is Hestia, Tethys, Cronos, Astraea, or Uranus for 3 turns - 4F

When Eris is below 15%:

Skill Set 11 - Will use once:
Scary Scream - Awoken bind for 5 turns
Mad Slaughter - 2x ATK for 999 turns
Conviction - Removes leader transformation effect

Rage Eruption - 356000 -> 712000 damage - Will repeat

* - Aggry is an adjective describing beads in South Africa, it isn't related to angry and isn't a typo.