Boss · The Rot Matriarch
"The air thickens with the stench of decay."
The tallest health pool in the Spire and the dungeon's signature set-piece fight. Verdelith's arrival is a full cutscene: eight beams of light converge around the arena before she tears free of the ground with a warden's roar. From there it's three escalating phases, a scripted ritual intermission, and a desperation nuke on the way down.
Found in: Withering Spire
| Stat | Value |
|---|---|
| Health | 1,250 |
| Damage | 10 (melee) + heavy ability damage |
| Armor | 5 |
| Boss bar | Green — Verdelith, the Rot Matriarch |
| Resistances | Immune to knockback |
Phase 1 — Spore Awakening (100%–70%)
Transition — "Enough games." (~70%, once)
Phase 2 — Sludge Surge (70%–40%)
Corrosion Ritual (~55%, once)
"Kneel. Let the rot take root!" Verdelith roots in place and summons four Toxin Anchors around the arena, and calls in three Cursed Spore Blossoms at the edges. She channels for roughly 12 seconds; when it ends she unloads a guaranteed nuke — 10 damage to anyone within 8 blocks, poison out to 20 blocks — regardless of how many anchors are still standing.
Transition — "THE ROT CONSUMES ME!" (~40%, once) — a permanent speed buff kicks in.
Phase 3 — Rot Frenzy (below 40%)
Last Gasp (~20%, once) — "IF I ROT, YOU ROT WITH ME!" A telegraphed nuke (poison + 6 damage in a 6-block radius), four Volatile Sludge summoned, and a plague-spread barrage that rains bolts across the whole room.
Four stationary adds summoned during the Corrosion Ritual — unlike Castle Nocturn's Ritual Anchors, these aren't immune to damage; they're a real, killable priority target.
| Stat | Value |
|---|---|
| Health | 50 |
| Damage | 0 (poison pulse only) |
| Threat | Ritual add |
| Drop | Amount | Chance |
|---|---|---|
| Experience | 700–1,000 | Always |
| Diamond | 6–12 | Guaranteed |
| Quartz | 10–20 | Guaranteed |
| Obsidian | 6–12 | Guaranteed |
| Slime Ball | 6–12 | Guaranteed |
| Gold Ingot | 6–12 | Guaranteed |
| Netherite Scrap | 2–4 | 60% |
| Boss Soul (Tier 4) | — | Guaranteed |
| Soul Fragments | 10–20 | Guaranteed |
| Toxic Soul | 1–3 | Guaranteed |
| Toxic consumable (Venomtip Arrows / Toxic Splash Flask / Spider Eye) | — | Guaranteed |
| Utility consumable (Haste Draught / Enchanted Golden Apple) | — | Guaranteed |
| Haste Draught (bonus) | 1–2 | 20% |
| Enchanted Golden Apple (bonus) | 1–2 | 15% |
| Beheading III book | 1 | 10% |
| Blank Key | 1 | 50% |
| Small Auto Salvager/Seller | 1 | 6% |
She wields Repulsor's Grasp and wears rotted, moss-green leather vestments, but neither is currently confirmed to drop — see the note on the dungeon page.