Should you register items in the collection?

Collection rules
RuleWhat it means for you
Item leaves your bag on registration Check its market price first
Five collection categories Each needs different items
Search and filters Find the entry an item belongs to before you decide
Caution message Toggle by checkbox; leave it on while you learn the system
Dark-trade warning A second warning when the item can be traded to the dark merchant

Register only what you don't need: the item disappears from your bag the moment you register it, and the finished set gives your character a permanent stat bonus. The collection and portrait restoration both live under Growth in the menu. An item that can go to the dark merchant has a second use, and registering it closes that door. If it also sells on the market, compare the three: collection bonus, dark-trade coins, or what a buyer pays.

Source · guide.netmarble.comNetmarble Korea guide: collection

Short answer

Registering an item in the VAMPIR collection deletes it from your bag for a permanent stat bonus once the set is done. When to hold back, the dark-trade warning, and how portraits restore over ten stages.

How does portrait restoration work?

A portrait is your profile picture and a stat item. Each one unlocks through ten stages, and every stage adds stats. Once all ten are done the restore button lights up, and a restored portrait can be equipped. The effects button adds up the bonuses from every portrait you've applied.

Korean portrait restoration screen with a portrait and its unlocked stat stages
Portrait restoration stages (KR). Image: Netmarble
Source / rights
Image / usage information: © Netmarble Corp. & Netmarble Neo Inc. · Image source ↗
  1. Put kits into the portrait you're closest to finishing: a portrait only becomes equippable after all ten stages.
  2. Farm kits from dungeons and quests before you pay for them.
  3. Restore, equip, then open the effects button to see the new total.

Source · guide.netmarble.comNetmarble Korea guide: portraits

FAQ

Can you get an item back after registering it in the collection?
No. Registration consumes the item, and there's no option to take it back out.
How do you know if the collection needs an enhanced item?
The enhancement screen has a checkbox that shows which enhancement level a collection entry needs, and whether the item can go to the dark merchant.
Where do portrait restoration kits come from?
Dungeons, quests and paid currency. They're also on the crafting list under consumables.

Related guides

Blood forms: summoning and synthesis

Market, dark trade and NPC shops