Need the Mossy Key for the Sunken Treasure Chest in Grounded? We'll guide you through the dark tunnel beneath the Pond Lab, past the Diving Bell Spiders, and back to that sweet loot!
Alright, so you're after that Sunken Treasure Chest, huh? It's got some good stuff inside, like a Mega Milk Molar and a BURG.L Chip. To get to it, you'll need the Mossy Key, and thankfully, it's not too far from the chest itself. The chest is chilling in that cave with the T-Rex toy, which leads into the Pond Lab.
The Mossy Key is hiding in a dark tunnel right under the Pond Lab. Now, this tunnel is crawling with Diving Bell Spiders. Sounds bad, right? But here's the cool part: every time you take one of them out, your oxygen meter refills completely. So, they're actually helping you out!
If you're worried about running out of air, don't sweat it. There's a tube with bubbles coming out of it in the same area as the key. Just hang out above it, and you can refill your oxygen for as long as you need before heading back to the main chamber where the Pond Lab, T-Rex, and the treasure chest are waiting.
Before you dive deep into the pond, I've got some gear recommendations to make this a lot smoother. You'll definitely want to craft and equip the Bubble Helmet, Fin Flops+, a Slime Torch or Slime Lantern+, and a Bone Dagger or Bone Trident. The helmet lets you stay underwater longer without needing air, the flippers make you swim faster, a light source is crucial for seeing anything in those dark depths, and the dagger or trident will help you deal with those spiders quickly.
The video below will show you exactly where to go from the main chamber to snag that Mossy Key. It's a visual guide, so just follow along!
Once you've got the Mossy Key in hand, just head back to the main chamber and pop open that Sunken Treasure Chest. Grab your BURG.L Chip and Mega Milk Molar. Try to make it back quickly after grabbing the key, and if you need to, swim back to that handy oxygen tube near the T-Rex to top off your air supply.
100% Human-Written. AI Fact-Checked. Community Verified. Learn how AntMag verifies content