Jastan

"Is the argon's influence growing again? The Valkyon Federation came to the conclusion that it isn't them but other powers that are pulling the strings behind the scenes."

Jastan is event merchant for July 2021 events.

Jastan only accepts Luminous Argon Flowers. Sources for these are:
 * dungeon Vanguard missions
 * three Ace Dungeons Vanguard missions

Also dungeons drop Corrupted Argon Seeds. These can be converted to Luminous Flowers with Argon Vanguard Scout Specimen (requires 10 Seeds) or Argon Vanguard Scout Leader Specimen (requires 10 Seeds).

One Argon Vanguard Scout Specimen is mailed daily. More are available from argon bosses that spawn in Fyrmount starting 21:00 daily (timezone CET/German time on EU servers: East Coast/NY TZ/UTC+4 on NA servers). (Bosses are usually killed within 15 minutes. Also join raid to participate.) Additional red boss spawns on 21:30 weekends only.

Location
Jastan is be found in Highwatch, near stairs on upper level, and banker, trade broker and Vanguard merchants.

Jastan's Shop
Jastan sells mainly materials to fine-tune Kaia's Soul Gear, few weeks before new gear is added. It may be better to buy materials for accessories, since they last longer.