The Darkasso is a Vampire Survivors relic added in Patch 1.11 (August 2024) that permanently extends the Arcana system with a parallel set of cards called Darkanas. It sits in the center of the final room in Room 1665, which you reach after killing 1,665 enemies in that hidden 16-room stage. Picking it up auto-grants the Moonlight Bolero (VI) Darkana and unlocks your ability to work toward eight more.
This guide covers the full unlock chain from spell to pickup, the complete list of all 9 confirmed Darkanas with their unlock conditions and spell shortcuts, the "dark reflection" pattern linking Darkanas to their Arcana counterparts, the Moonlight Bolero boss-spawn mechanic that makes it uniquely valuable, and the 23-card threshold that unlocks upgraded Arcana chests.
The Darkasso is the Randomazzo's shadow sibling. Where the Randomazzo (collected in Gallo Tower) unlocks the regular Arcana card system, the Darkasso unlocks a parallel set called Darkanas that share the exact same mechanics but different themes. Both sets of cards slot into the same three-Arcana-per-run cap and share the same boss-chest draft at 11:00 and 21:00.
Per Poncle's patch notes introducing Darkanas: "The only difference between Arcanas and Darkanas is their theme." Functionally they are identical. Do not expect Darkanas to be stronger or weaker than regular Arcanas. What they give you is more options, not better options. And at 23 total cards (Arcanas + Darkanas combined), a separate threshold unlocks with real gameplay benefits.
Picking up the Darkasso does two specific things immediately:
The Darkasso is not unlocked through normal play. There is no boss drop, evolution chain, or achievement gate that reveals it. You have to manually cast a spell to get access to the stage, then survive the stage to collect the relic.
forbiddenbox, and confirm. This adds Room 1665 to your stage list and immediately unlocks the EXTRA: Room 1665 achievement.The 16-room kill-milestone table, unique no-despawn enemy mechanic, respawning light sources, and recommended builds are covered in detail on our Forbidden Box guide. That page focuses on the spell-and-stage side of this unlock chain; this page focuses on the relic and what it gives you.
If you want the Darkasso relic without playing through Room 1665, there is a direct-unlock spell:
darkassami — cast in the Forbidden Scrolls of Morbane from the Secrets menu. This awards the Darkasso relic and Moonlight Bolero (VI) instantly, skipping the entire Room 1665 stage.
Most players should use the stage-based unlock instead. Here is why: casting darkassami skips the two Room-1665-tied achievements (\"Be embraced by the Darkasso\" and \"Get touched by the Darkasso\"), and completionists who want the full trophy list will end up having to run the stage anyway. The spell exists primarily as a convenience for players restarting a save file or testing Darkanas on a fresh account.
Note that darkassami only grants the relic and Moonlight Bolero. The other eight Darkanas still require their individual unlock conditions, which are listed below.
The Darkasso menu uses the same grid layout as the Randomazzo (regular Arcana menu), but the visual treatment is deliberately horror-themed. The background is a writhing wall of red tentacles with staring eyes, and the cards themselves have black backing instead of the Randomazzo's gold border.
Obtained Darkanas appear with a yellow highlight circle and sort to the top of the grid. Unobtained Darkanas show as face-down card backs. The "GET" and dice buttons on the right let you confirm a selection or randomly roll one during a run.
There are currently 9 confirmed playable Darkanas per the Weirdgloop wiki's Darkanas category. Poncle has said the set may expand over time, but these are the ones available today with their unlock conditions documented:
| Darkana | Effect Summary | Unlock Condition | Spell |
|---|---|---|---|
| Sapphire Mist (I) | Listed weapons have a Luck-scaling chance to fire twice (or more) | Finish a run with Space Dude at -85% Cooldown | ottagabli |
| Hidden Anathema (III) | Movement-based scaling (parallel to Tragic Princess) | Defined character condition | ecirtarepmil |
| Pale Diamond Incursion (V) | Listed weapons target nearest enemy; Speed gives compounding cooldown reduction | Discover 10 Golden Treasure Chests in one run with Zi'Appunta Belpaese | apapli |
| Moonlight Bolero (VI) | Spawns an extra Levatee or Levarsee boss every minute; drops bonus Arcana/passive chests | Granted automatically on Darkasso pickup | darkassami |
| Hail from the Future (X) | Level-ups spawn random stage pickups (Gold Finger, Clover, Candybox, Arma Dio) | Trigger a Weird Souls Purifier with Santa Ladonna | atoural |
| Crystal Cries (XII) | Frozen enemies drop Crystallized Souls (Growth, Recovery, Max Health); auto-Orologion at 20% HP | Trigger a Starry Heavens with She-Moon Eeta | oseppal |
| Call of a Mad Moon (XIII) | Converts Treasure Chests into Golden Treasure Chests | Defined character condition | etromal |
| Victorian Horror (XVIII) | Conditional effect (Boogaloo of Illusions counterpart) | Survive 30 minutes in Green Acres with no active weapons | anulal |
| Wandering the Jet Black (XXI) | Orbiting crimson projectiles that explode based on recovered Health and Magnet | Reach 665 Max Health with Bat Robbert | odnomli |
Older references you may see online: Some third-party guides mention additional Darkanas called "Edge of the Earth (VIII)", "Heir of Fate (XIX)", and "Stake to your Heart (0)". These appear in older patch-note archives and beta references but are not currently listed in the canonical Weirdgloop wiki category as of patch 1.14. The 9 above are the currently confirmed playable set.
Every Darkana shares its Roman numeral with an Arcana. Sapphire Mist (I) pairs with Gemini (I), Moonlight Bolero (VI) pairs with Sarabande of Healing (VI), Crystal Cries (XII) pairs with Out of Bounds (XII), and so on. This is not a coincidence. The wiki and the community have independently confirmed that Darkanas are designed as visual and thematic inverses of their Arcana counterparts.
The visual parallels are obvious side-by-side. Both (I) cards share the same two-figure composition, just color-inverted. Both (VI) cards share the same radial/rosette pattern, with Sarabande's white cross-bloom stars becoming Moonlight Bolero's spiked orange eye.
The theme goes deeper than visuals. Vampire Survivors' Arcanas are loosely based on the Major Arcana of real tarot decks, and each Darkana represents the reversed (inverted) tarot position of its Arcana counterpart:
This reversed-tarot framing explains the aesthetic: Darkanas are the "dark side" of their paired Arcanas, mechanically distinct but thematically mirrored.
The dark reflection theme extends to the spell codes themselves. Every Darkana spell except Moonlight Bolero's darkassami is the Italian-language name of its counterpart Arcana tarot card, spelled backwards:
ottagabli (Sapphire Mist) = ilbagatto reversed = "The Magician" in Italianapapli (Pale Diamond Incursion) = ilpapa reversed = "The Pope" in Italianoseppal (Crystal Cries) = lapesso reversed = "The Hanged Man" in Italianodnomli (Wandering the Jet Black) = ilmondo reversed = "The World" in ItalianThis is deep lore work from Poncle. The spell itself is a linguistic inversion, the visual is a color inversion, and the tarot meaning is a position inversion. Three levels of "darkness" baked into every Darkana.
Because Moonlight Bolero comes free with the Darkasso, most players equip it on their first few runs without knowing what it does. It is genuinely one of the more powerful Darkanas in the game, especially for completion and farming builds.
When Moonlight Bolero is active, a special boss spawns every minute in addition to normal enemy waves. There are two boss types:
Killing either boss drops a black treasure chest. These chests can contain one of three reward types:
The real power is the stacking. Over a long enough Moonlight Bolero run, you can theoretically obtain every unlocked Arcana and every passive item in a single game. This pairs exceptionally well with Endless Mode (unlocked via the Seventh Trumpet), where the run never ends, so the bonus bosses keep stacking indefinitely.
Moonlight Bolero (VI) can be rerolled at the start of a run by exiting and re-entering the stage. This lets you guarantee it as your opening Arcana pick, which is highly valuable if you also have Game Killer (0), because Game Killer forces all chests to contain 3+ items, meaning one of the Bolero-spawned passive chests can drop multiple new passives at once.
One specific Darkasso-era mechanic is worth calling out on its own, because it is buried in the wiki and not covered by most competitor guides.
Once you have unlocked 23 or more Arcanas + Darkanas combined (which requires at least one Darkana, meaning you must have the Darkasso), Arcana chests at 11:00 and 21:00 change behavior:
There are 22 regular Arcanas in the base game. That means unlocking just one Darkana past 22 is enough to hit the 23-card threshold and flip this benefit on permanently. The Darkasso is not only a Darkana unlocker; it is a direct upgrade to every Arcana chest you ever open for the rest of the game.
Unlock the Forbidden Scrolls of Morbane, cast the forbiddenbox spell to unlock Room 1665, then kill 1,665 enemies across the stage's 16 rooms. The Darkasso sits in the center of the final room and is collected automatically when you walk near it. Alternatively, cast darkassami to unlock the relic directly without playing the stage.
It unlocks the Darkana card system, a parallel set of cards that work identically to Arcanas but with different themes. It also auto-grants the Moonlight Bolero (VI) Darkana and, by taking you past 22 total cards, unlocks the 6-pick-plus-free-reroll upgrade for all Arcana chests.
9 confirmed playable Darkanas per the current Weirdgloop wiki category: Sapphire Mist (I), Hidden Anathema (III), Pale Diamond Incursion (V), Moonlight Bolero (VI), Hail from the Future (X), Crystal Cries (XII), Call of a Mad Moon (XIII), Victorian Horror (XVIII), and Wandering the Jet Black (XXI). Older third-party guides reference additional names that are not in the current canonical list.
darkassami. Cast it in the Forbidden Scrolls of Morbane to immediately unlock the Darkasso relic and the Moonlight Bolero (VI) Darkana. It skips Room 1665 entirely, which also means you forfeit the two stage-based achievements tied to picking up the relic the intended way.
No. Per Poncle's own patch notes, Arcanas and Darkanas differ only in theme, not function. Darkanas add variety and specific effects, but they do not power-creep past regular Arcanas.
Moonlight Bolero (VI) is the strongest starting choice because it spawns bonus bosses every minute that drop chests containing Arcanas or passive items. Crystal Cries (XII) is excellent for freeze builds, and Hail from the Future (X) stacks powerful level-up pickups.
The Darkasso deliberately uses a horror-themed visual layer with a background of writhing red tentacles and watching eyes, themed to match Room 1665's descent-into-evil aesthetic. Individual Darkana cards are color-inverted versions of their Arcana counterparts, reinforcing the \"dark reflection\" concept.
Indirectly, yes. Once you have 23+ total cards unlocked (22 Arcanas + at least 1 Darkana), every Arcana chest in the game permanently offers 6 options instead of 4, and each chest grants 1 free Reroll. The Darkasso is the only way to hit that threshold.
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Wiki citations: Darkasso, Arcanas and Darkanas, Darkanas category, Room 1665, Moonlight Bolero (VI).
Sprites and screenshots sourced from the Vampire Survivors Wiki (vampire.survivors.wiki) under CC BY-NC-SA 3.0.