It's nice to get new characters, but you need to level them up properly. Wuthering Heights It may take longer than expected, especially if you need to find items like Terraspawn Fungus along the way. Here's where you can get these special resources:
Location of Wuthering Heights Terraspon fungus
Terraspawn Fungi can be found around the Dezorok Plateau region towards the north of the map. They're mainly found around the Withering Frontline, next to the Sundering Melphis boss, but there are also some in the upper part of this zone, near the Impermanent Heron boss. There are a lot of teleporters around, so getting to the right zone shouldn't be a problem.
Alternatively, you can purchase them from the Shifang Pharmacy shop in Jinzhou for 3000 credits each, up to a maximum of 15. Stocks are replenished every Monday, so this is an easy source of ingredients if you've already run out of flowers in the world. After you've picked up the flowers, they'll respawn a few daily resets later, so you can wait a bit if you need them.
Related: What time is Wuthering Heights' daily reset?
Like other similar ascension items, Terraspawn Fungus is required to level up some characters. As of 1.0, the only character that needs it is Yuanwu, who got it for free by completing the first Tower of Adversity challenge zone, which is one of the first big recommended challenges in the game. Essentially every player will get him at some point, so if you're thinking about leveling him up, you'll need these fungus.
Even if he's not your type Wuthering HeightsYou'll likely be using Terraspawn Fungus for your own ascension in the future, so it wouldn't hurt to stock up on a few. New banners are coming sooner than you think.