To upgrade a weapon :
- Get the weapon to level max (8 for most of them). Some upgrades needs 2 weapons : get both to level max.
- Get the passive associated. Any level, except for rings, metaglios and Torrona's box who needs to be max level too.
- Kill a boss to drop a chest : have a chance to contains upgraded weapon (garanteed after 10:00).

Two evolutions are considered as "gift", they are extra items and don't replace any slot : "Sole solution" and "Super Candybox II Turbo"

WeaponsPassivesUpgrades
To unlock Arcanas, you have to find the Randomazzo in the level "Gallo Tower".
Once collected, it permanently enables the Arcana system.

Game Killer

Halts XP gain. XP gems turn into exploding projectiles. All Treasures contain at least 3 items. Defeat the final enemy in the Cappella Magna

I - Gemini

Listed weapons come with a counterpart.
Reach Level 99 with Pugnala

II - Twilight Requiem

Listed weapon projectiles generate explosions when they expire.
Reach Level 99 with Dommario

III - Tragic Princess

The cooldown of the listed weapons reduces when moving.
Reach Level 99 with Porta

IV - Awake

Gives +3 Revivals. Consuming a Revival gives +10% MaxHealth, +1 Armor, and +5% Might, Area, Duration, and Speed.
Reach Level 99 with Krochi

V - Chaos in the Dark Night

Overall projectile Speed continuously changes between -50% and +200% over 10 seconds. Reach Level 99 with Giovanna

VI - Sarabande of Healing

Healing is doubled. Recovering HP damages nearby enemies for the same amount.
Find the Randomazzo

VII - Iron Blue Will

Listed weapon projectiles gain up to 3 bounces and might pass through enemies and walls.
Reach Level 99 with Gennaro

VIII - Mad Groove

Every 2 minutes attracts all standard stage items, pickups, and light sources towards the character. Reach minute 31 in the Mad Forest

IX - Divine Bloodline

Armor also affects listed weapons' damage and reflects enemy damage. Character gains bonus damage depending on missing Health. Defeating enemies with retaliatory damage gives +0.5 Max Health.
Reach Level 99 with Suor Clerici

X - Beginning

Listed weapons get +1 Amount. The character's main weapon and its evolution gain +3 Amount instead.
Reach Level 99 with Antonio

XI - Waltz of Pearls

Listed weapon projectiles gain up to 3 bounces.
Reach Level 99 with Imelda

XII - Out of Bounds

Freezing enemies generates explosions. Orologions are easier to find.
Reach minute 31 in the Gallo Tower

XIII - Wicked Season

Overall Growth, Luck, Greed, and Curse are doubled at fixed intervals. The character starts gaining +1% Growth, Luck, Greed, and Curse every 2 levels. Reach Level 99 with Christine

XIV - Jail of Crystal

Listed weapon projectiles have a chance to freeze enemies.
Reach Level 99 with Pasqualina

XV - Disco of Gold

Picking up coin bags from the floor triggers Gold Fever. Obtaining gold restores as many HP. Reach minute 31 in the Inlaid Library

XVI - Slash

Enables critical hits for listed weapons. Doubles overall critical damage.
Reach Level 99 with Lama

XVII - Lost & Found Painting

Overall Duration continuously changes between -50% and +200% over 10 seconds. Reach Level 99 with Poppea

XVIII - Boogaloo of Illusions

Overall Area continuously changes between -25% and +50% over 10 seconds. Reach Level 99 with Concetta

XIX - Heart of Fire

Listed weapon projectiles explode on impact. Light sources explode. Character explodes when damaged.
Reach Level 99 with Arca

XX - Silent Old Sanctuary

Gives +3 Reroll, Skip, and Banish. Gives +20% Might and -8% Cooldown for each active weapon slot left empty. Reach minute 31 in the Dairy Plant

XXI - Blood Astronomia

Listed weapons also emit special damaging zones affected by Amount and Magnet. Enemies within Magnet range take damage based on Amount.
Reach Level 50 with Poe