Unlocks: Hot Dog’s “Ding Dong Ditch” Ability
Soon after falling from the bridge, you’ll reach this set of blocks. Keep moving until you pick up a key.
Your first instinct will be to use the key on this gate you passed earlier. Don’t do it! Instead, enter the hut right next to the gate.
Inside the Sour Sink Lodge, use your key on the lock to reach the Soul Gem in the back of the room. And don’t worry – there’s a spare key back there for you too.