Armor Crafting Catalyst is an Etc item in MapleStory Classic World. The client describes it: “When used while crafting a armor, there is a chance the item's bonus stats will change.” An NPC pays 1,000 mesos for one. It is a reward from 3 quests.
Read from the Public Release client, pulled ; unchanged since Closed Online Test 2 ().
Hunt here

Etc · #4130002
In the client's words
verbatimWhen used while crafting a armor, there is a chance the item's bonus stats will change.
1,000
if you sell it
How to get it
cheapest way firstQuest reward
paid out once, on completionSeen it drop?
Seen this drop in game? Log in and you can report which monster drops it. Drop tables are server-side, so player reports are the only way this page can ever be right about them. Training on one monster rather than hunting one item? A monster page takes the whole list at once.
