Events, the Guild Member Shop, and the Guild Aid system are all great sources of Rare Catalysts like the Mysterious Flash. ..

Source #1: Unrecorded History 2-1 Grey Cliff Forest (Best Source)

The Farming Stage 2-1 Grey Cliff Forest will allow you to get the most Mysterious Flash catalysts out of all the methods listed here. By farming this stage, you will be able to get the most Mysterious Flash catalysts for your flash Catalyst collection.

The Mysterious Flashes are a type of drop that can be found in this area, and they can also be bought in the AP Exchange Shop.

The Mysterious Flash is a powerful item that costs 120 AP to buy, and you can only buy them up to 10 times per week. Although you can get them as drops as well.

To maximize your AP gain when running this Adventure stage, buy only what you need and equip pets that boost AP acquisition. ..

Source #2: Events

The side story events in the game have various shops that sell different resources, including Epic and Rare Catalysts. These shops can be helpful in finding new items or upgrading your current ones.

If that isn’t enough, we also have Login Events, Giveaway Events, and Minigame Events where we can earn Catalyst Chests just by participating. ..

Events are a great way to meet new people, learn new things, and have fun. By participating in as many Events as you can, you’ll be able to make connections and build relationships that will last long after the Event is over. ..

Source #3: Guild Member Shop

The Guild Member Shop is the most reliable source of Catalyst Chests in the game. They have the best prices and offer the best quality.

Looking to get Mysterious Flash? You should purchase both the Random Rare Catalyst Chests and the Random Catalyst Chests if you want to maximize your chances of getting it.

Whether or not you get that specific Catalyst depends on RNG when it comes to these random chests, but I would still recommend buying at least one of each of them every week, regardless. ..

Source #4: Guild Aid

The Guild Aid system allows you to request materials from your guildmates. This system is useful for requesting runes, catalysts, or crafting materials.

You can only change your selected material once every day, and you cannot change it until after the day resets.

Don’t be a freeloader and take advantage of the opportunities that Guilds offer. Requesting catalysts often while not donating any yourself can lead to being kicked out of a very strict Guild!