“Secret Arsenal” is available again.
For this event you have to be at least level 50.
For certain amount of roses you can buy different items, such as set of Heavenrender Equipment, which is the best in the game, Twilight Equipment set, pixie Spirits and others.
You buy items for certain amount of roses, which you can buy in the Secret garden.
All those roses you can spend in arsenal.
It’s the only place where you can spend roses, so don’t waste your time and buy as much as you like.