Dungeons

Dungeons are mazes under the Overworld, full of wild Folks. Make it to the bottom and a boss is waiting.

Getting in

Find a Dungeon Entrance in the Overworld and choose Enter Dungeon.
It costs 10 coins plus 10 for each level of your active Folk: 60 coins at level 5.
Go alone or in a party of up to 3. Invite friends from the entrance.

Each entrance leads to its own maze, and you get the same one every time you go back. Other players get a different maze from the same entrance, and a party shares one.
Walking in a dungeon costs no energy.
Wild Folks there are at your Folk's level or up to 5 levels higher.
Traps flash on and off. Step on one while it is lit and your Folk loses 15% of its HP.
Anything you pick up is yours straight away.
If your Folk is beaten you are out, and the entry fee is gone. Its HP outside the dungeon is not touched.
In a party, stand on a beaten friend for 3 seconds to bring them back with 30% HP. Each player can be saved once per run.
Reach the exit to escape. Escaping counts for the Island Journal and daily quests.

Something in the dark is guarding the way down. Defeat it to take its key. The key opens the door to the boss for your whole party.

A rooted, fungal mass that has claimed the bottom of the dungeon. Its roots strike; its body never does.

It fights at level 12, or at your Folk's level if that is higher, and it gets tougher the more players there are.
It never moves. Its roots strike the floor around it: red marks show where they will hit, and violet ones also heal it. Step out of the way.
Its body can only be hurt between attacks, while it rests.

The first time you beat it: 500 coins, a Heart Seed and the Heart of the Deep Slayer badge.
After that: 80 coins and a chance at another Heart Seed, better when your Folk's level is higher.
Once you have beaten it, a Dungeon Entrance can take you straight to it for 3 times the entry fee.