Echo Ascension

The endgame boss chain — regional keys, echoed dungeons, organs, and the four archetype pendants.

The Dark Citadel

Echo Ascension is the boss-chain endgame that sits on top of Region Resonance. It turns resonance-raised regions into a directed hunt: farm four regional Keys, spend them on four one-attempt boss dungeons to collect four Organs, then feed all four Organs into a re-echoed Dark Citadel to fight Theron for one of four archetype Pendants.

The chain at a glance

Farm Keys. A level-100+ Special enemy on a combat tile in a region with applied Resonance ≥ 1 has a 6% chance to drop that region’s Key.
Open an echoed regional dungeon (level 125). Spend the Key + a flat 250,000 gold. One attempt only.
Kill the boss → Organ (100%). Each regional boss guarantees its Organ, named Echoed Heart of <boss>.
Open the echoed Dark Citadel finale (level 150). Consume all four Organs + a flat 500,000 gold. One attempt only.
Kill Theron → a Pendant. A guaranteed, weighted-random amulet unique dropped at item level 150.

Step 1 — farming Keys

Keys drop only from the hardest enemies in regions you have already pushed with Resonance:

The tile must be a combat tile in a region with applied Resonance ≥ 1 (its effective difficulty rank above its base rank). Dungeons and the Delve never drop Keys.
The enemy must be a Special and at level 100 or higher (ASCENSION_KEY_MIN_LEVEL = 100).
Drop chance is a flat 6% per qualifying Special (ECHO_KEY_DROP_CHANCE = 0.06).

Because enemy level follows effective rank, it scales past the hero cap of 99 once a region is resonant — and a Special spawns +2 levels above its tile. Each region therefore starts paying out at a different Resonance level: the Shattered Mountains from II, the Scorched Foothills from IV, the Cursed Swamp from VI, and the Parched Grasslands only from VIII. There is no pity timer; the 6% is independent every kill, so expect roughly 12 qualifying Specials for a ~50% shot at a given Key (1 − 0.94^12 ≈ 0.52) and ~38 for ~90%.

Step 2–3 — the four regional boss dungeons

Each Key re-echoes its own region’s dungeon to a normalized level 125 (ECHOED_DUNGEON_LEVEL = 125, the same for all four — not region-relative). The run is one attempt: entering consumes the Key and the 250,000 gold fee up front, win or lose. Clearing the boss grants that region’s Organ at 100%.

Region	Boss	Key	Organ (guaranteed)
Parched Grasslands	Aridon	Parched Echo	Echoed Heart of Aridon
Cursed Swamp	Malach	Cursed Echo	Echoed Heart of Malach
Scorched Foothills	Pyrrhus	Scorched Echo	Echoed Heart of Pyrrhus
Shattered Mountains	Garran	Shattered Echo	Echoed Heart of Garran

Step 4–5 — the echoed Dark Citadel finale

Once you hold all four Organs, the Dark Citadel dungeon can be re-echoed to level 150 (ECHOED_FINALE_LEVEL = 150). Entry consumes all four Organs plus a flat 500,000 gold and is, again, a single attempt — the Organs are gone whether or not you survive. Theron is the finale boss.

Clearing Theron guarantees one Pendant (a unique amulet), rolled by weighted random among four variants. All four currently carry equal weight, so each is a flat 25% per clear. The Pendant drops at item level 150.

The four Pendants

Every Pendant shares a fixed spine — +3 to all skill ranks, +50–100 flat life, and +10–20% all resistances — then leans its attribute spread toward one build archetype:

Pendant	Archetype	Signature attribute roll
Pendant of the Sentinel	Tank	Constitution +15–30 (Str/Dex/Vit +5–10)
Pendant of the Vanguard	Balanced	Str/Dex/Vit/Con +10–15 each
Pendant of the Duelist	Fast	Dexterity +15–30 (Str/Vit/Con +5–10)
Pendant of the Berserker	Slow/heavy	Strength +15–30 (Dex/Vit/Con +5–10)

Like all uniques, a Pendant can be tempered, enchanted, base-upgraded and salvaged but cannot be affix-crafted — see Uniques for the full rules and the pendants’ place in the unique roster.

Fees, attempts, and skills — the fine print