Refining gear will grant you additional stats when equipping them. Refine is indicated by a + followed by a number in the beginning of the equipment's name.

Hollgrehenn (홀그렌) is the NPC that can refine. He can be found in many major cities indicated by an anvil icon on the minimap and above the NPC. Example: /navi prt_in 63/60Copied!

Notice: kRO usually hosts a Refine Event three times a year: April, August, and December.

Different level weapons and grades provides unique damage bonuses per refine.

Note:

• ATK & MATK per Refine and P.ATK & S.MATK per Refine will be displayed in your status window.
• Bonus ATK & MATK per Refine Over Safety will NOT be displayed in your status window.
• Over Safety is defined as refine levels below 100.00% probability using Normal Ore
• All damage bonuses are cumulative for the total refine.

For clarity, armors refers to not only the body armor equip, but also garments, footgears, shields, and headgears (top).

Armors provides an accumulating Hard DEF bonus per refine in relation to its current refine by the formula: Floor[( 3 + Current_Refine ) / 4]

For Lv 2 Armors, this Hard DEF bonus is increased by 120% while also granting 2 RES and MRES per refine.

Shadow Equipment are special equipment which gives their own unique effects per refine:

• Shadow Weapons grants +1 ATK & MATK per Refine.
• All other Shadow Equipment grants MHP + 10 per Refine.

In addition to minor base stats, Shadow Equipment can also provide bonus effects listed in their description.

You can use the normal refining system or shadow hammers (obtained from Kachua Key or Players):

• Holgren's Shadow Refine Hammer
• Shadow 9 Refine Hammer

Unlike normal armors, shadow accessories ( Ring and Pendant) can be refined.

Each category of equipment requires different materials to refine depending on its current refinement.

/navi prt_in 63/69Copied!

You can purchase or craft refine ores from an NPC near every refine NPC. Example: Prontera Refine House /navi prt_in 63/69Copied!

IMG	Item	Currency Amount
	Phracon	200z
	Emveretarcon	1,000z
	Oridecon	Rough Oridecon 5
	Elunium	Rough Elunium 5
	Bradium	50,000z Oridecon 3
	Carnium	50,000z Elunium 3
	Carnium	50,000z Refined Bradium 1
	Etherium	10,000z Etel Dust 1 Elunium 1
	Etherdeocon	10,000z Etel Dust 1 Oridecon 1
	Etel Bradium	50,000z Etel Dust 3 Bradium 1
	Etel Carnium	50,000z Etel Dust 3 Carnium 1
	Enriched Etherium	20,000z Etel Dust 2 Enriched Elunium 1
	Enriched Etherdeocon	20,000z Etel Dust 2 Enriched Oridecon 1
	HD Etherium	50,000z Etel Dust 3 HD Elunium 1
	HD Etherdeocon	50,000z Etel Dust 3 HD Oridecon 1
	HD Etherium	50,000z Etel Dust 3 (Limited) HD Elunium 1
	HD Etherdeocon	50,000z Etel Dust 3 (Limited) HD Oridecon 1
	HD Etel Bradium	50,000z Etel Dust 3 HD Bradium 1
	HD Etel Carnium	50,000z Etel Dust 3 HD Carnium 1
	HD Etel Bradium	50,000z Etel Dust 3 (Limited) HD Bradium 1
	HD Etel Carnium	50,000z Etel Dust 3 (Limited) HD Carnium 1

There are Lapine Upgrade items that can refine specific equipment to a designated or random refine number at 100% chance.

Note: Some Lapine Upgrade items require a minimum refine such as +4 in order to use them. Refer to their description for target items and requirements.

Lapine Upgrade Item	Obtained From
Automatic Armor 11 Refine Cube	Kachua Key, Players
Automatic Reinforcement Cube	Zeny Exchange in Episode 17.2
Biological Lab Helm 11 Refine Cube	Kachua Key, Players
Biological Lab Weapon 12 Refine Cube	Kachua Key, Players
Fallen Warrior's Headgear 12 Refine Cube	Kachua Key, Players
Geffen Magic Tournament 12 Refine Cube	Kachua Key, Players
Grace Refine Ticket	Cor Core Exchange in Episode 17.1
Grey Wolf Refine 7 Box	Amethyst Fragment Exchange in Episode 18
Grey Wolf Refine 9 Box	Amethyst Fragment Exchange in Episode 18
Illusion Dungeon Random Refine Cube	Monsters in their respective Illusion Dungeon, Players
Illusion Reinforcement Cube	Zeny Exchange in Episode 17.2
Imperial Refine Ticket	Schwartz's Honor Token Exchange in Episode 16.2
Noblesse Refine Ticket	Honor Token Exchange in Episode 16.1
OS Weapon 11 Refine Cube	Kachua Key, Players
Racing Cap 11 Refine Cube	Kachua Key, Players
Special Illusion Dungeon Random Refine Cube	Kachua Key, Players
Temporal Armor 11 Refine Cube	Kachua Key, Players
Temporal Circlet 11 Refine Cube	Kachua Key, Players

/navi prontera 184/177Copied!

Talk to NPC (제련 연구가) behind the Anvil House in Prontera to use Guarantee Refine Certificate which will refine your equipment to designated number at 100% chance.

Note:

• Certificates are account-bound, but players can utilize the Refine Certificate Packager to make them tradable.
• Certificates are specific to either Weapons or Armors.
• Shadow Equipment, Lv 5 Weapons, and Lv 2 Armors CANNOT use Guarantee Refine Certificate due to their unique refine system.
• Players can craft Weapon Guarantee Refine Certificates by converting Crimson, Thanatos, and Vicious Mind weapons with Weapon Refinement Hammers bought in Paramarket.
• Players can combine lower refine Weapon Guarantee Certificates into higher ones in Paramarket.

Using Blacksmith Blessing (BSB) allows an item to be protected from being destroyed or decreasing in refine value during the refine process. Simply add the required amount in the Refine UI where applicable.

You cannot use Blacksmith Blessing for shadow equipment.

Refine Process	Blacksmith Blessing Required
+7 → +8	1
+8 → +9	2
+9 → +10	4
+10 → +11	7
+11 → +12	11
+12 → +13	16
+13 → +14	22

Sources:
https://ro.gnjoy.com/news/probability/View.asp?seq=1941553
https://ro.gnjoy.com/news/probability/View.asp?seq=1941565
https://ro.gnjoy.com/news/probability/View.asp?seq=1941558
https://ro.gnjoy.com/news/probability/View.asp?seq=1941567
https://ro.gnjoy.com/news/probability/View.asp?seq=4081647
https://ro.gnjoy.com/news/probability/View.asp?seq=4081648
https://ro.gnjoy.com/event/2020/09/0909_ro1_4thOccupation_final/
http://www.inven.co.kr/board/ro/1951/5061
http://www.inven.co.kr/board/ro/1951/5075
http://www.inven.co.kr/board/ro/1951/5078
http://www.inven.co.kr/board/ro/1941/16669
http://www.inven.co.kr/board/ro/1942/39684
http://www.inven.co.kr/board/ro/1952/301752