To use this item, the user must talk to Troy (232,172), in Payon, north of the hammer.

Rates can be improved by use of the Slot Advertisement item, which is available on iRO through cash shop events which are offered periodically. The increase is rumored to be on the order of 5%. It is unclear whether this reflects game mechanics, and no large samples are available. The iRO website suggests that certain NPCs will have a better chance of slotting different level weapons or different types or armor. The best estimates of success chances are: S Grade items are the most difficult to upgrade.

Skull Ring will grant a 1% resistance to attacks from the undead race after receiving a new card socket.

Ice Pick will have attack power reduced from 80 to 70 after receiving a new card socket.

Tiara/ Crown will have INT + 2 option reduced to INT + 1 after receiving a new card socket.

Prontera: Inside upgrade shop (prontera 175, 188) -> (prt_in 22, 61).

Items listed in italics can be enchanted by Leablem at the following locations.

Prontera: Inside upgrade shop (prontera 175, 188) -> (prt_in 33, 70).

Lighthalzen: Inside upgrade shop (lighthalzen 195, 37) -> (lhz_in02 281, 35).

Items listed without italics can be enchanted by Seiyablem at the following locations. He requires a Slotting Advertisement and will not break the piece of equipment on failure. Another NPC, Troy, can also attempts to add slots. If the attempts is failed, item, Zeny and ores are lost. Each attempt requires 1 item, some ores and Zeny. The NPCs Seiyablem and Leablem allow a player to attempts to add 1 to 4 slots to a piece of equipment.

6.1 Ragnarok World Championship Accessory Enchants.

Katar of raging blaze 3 slot