Oooo you got a Summer Dark Forest Lootbox! Forgotten Shadowcorn chronicles once spoke of these chests, chiseled from slabs of ancient stone and sealed with an eerie, arcane clasp, then hidden away in the forest as secret caches of supplies for when they would be needed again for future struggles. Thought lost to the ages and overgrown with gnarled roots as though the spirit of the Dark Forest itself had seeped inside, this chest looks like the seal is still good! Open it up and who knows what you could find, they're supposed to be packed with crafting goodies!
