Unlocks: Chill’s “Call the Narwhal!” Ability
Once you reach the Pit with Possibilities, you’ll have to use a spring pad to reach this ledge and grab a key. Note the breakable wall to the left; you can take this out with a bomb or a Giant attack.
Grab the bomb you passed to reach this ledge or bust through the wall with a Giant – your choice.
Repeat for the second breakable wall and grab the Soul Gem tucked away up here.