Frog Keys 99 Nights in the Forest are the gateway to the secret Frog King fight introduced in the Frog Invasion update. You need a full set of eight keys to open the locked door inside the Frog Cave and reach the boss room where rare loot awaits. This guide explains where the keys are found, how to access the cave, and what drops you can earn after the fight.
What are Frog Keys in 99 Nights in the Forest?
Frog Keys are special items hidden across the forest that collectively unlock the path to the Frog King boss. Without all eight, the door inside the Frog Cave remains closed and you cannot reach the chest with exclusive rewards. Each key is placed in a different pond, turning exploration into a core step before any boss attempt.
Because frog species patrol many of these areas, collecting keys is not just a scavenger hunt. Expect resistance around pond edges and be ready to secure the glowing object quickly before nearby enemies collapse on your position.
How to Get Frog Keys
The eight keys are scattered among multiple ponds throughout the forest. Your job is to visit each pond, locate the glowing object, and collect it while keeping an eye on hostile spawns. The process is simple but demands patience and a steady route.
Move between ponds methodically rather than sprinting in a straight line. Enemies tend to gather around water, so take a moment to read the area before committing. If a pond gets crowded, back off and re-approach from another angle. Repeat until all eight Frog Keys are in your inventory.
Once you have them, the next step is to locate the giant whirlpool on the map. This whirlpool is the entrance to the Frog Cave, so make sure your key count is complete before you jump. Going in short a key only delays your run and forces another loop of the forest.
How to Open the Frog Cave and Unlock the Frog King
With eight keys secured, head to the whirlpool and jump to enter the Frog Cave. Navigate deeper through the cave until you reach the locked door. Interact with the mechanism and insert all 8 Frog Keys to open it. If a key is missing, the mechanism will not trigger, and the door will remain shut.
Beyond the door is the Frog King arena. Defeat the boss to gain access to the reward chest. Remember that the chest cannot be opened without beating the Frog King first, so plan your entry only when you are fully prepared to complete the fight.
Frog King Loot Drops and Rates
The Frog King’s chest contains some of the most valuable gear tied to the Frog Invasion theme. Each item has a low drop rate, which is why acquiring all eight keys and clearing the fight is worth the effort.
Poison Spear — 3 percent
Poison Armor — 1 percent
Blowdart — 1 percent
Frog Boots — 1 percent
These pieces are both rare and powerful, making repeated clears an attractive option if you are chasing a specific drop.
Practical Route and Timing Tips
Keep your path simple: collect keys pond by pond, then push the cave. Avoid splitting the key hunt and the boss attempt across multiple sessions if you can help it. The keys are the longest part; once they are secured, the rest is a straight shot through the whirlpool, down the Frog Cave corridor, and into the door mechanism.
While gathering keys, anticipate enemy presence near water and reposition instead of forcing bad engagements. The goal is clean pickups, not extended fights that slow down your route. When the set of eight is complete, verify your count before entering the cave to prevent a wasted trip.
Final Thoughts
Frog Keys 99 Nights in the Forest turn exploration into meaningful progression. Collect eight glowing keys from the forest’s ponds, dive through the whirlpool to reach the Frog Cave, unlock the door, and defeat the Frog King to claim rare loot. With drop rates that include the Poison Spear at 3 percent and several 1 percent items, the path is demanding but the rewards justify the grind.