Beyond the White Door

1. You need to cool off the lump first.
2. You can't use water, since you have nothing to carry liquids in.
3. Use frozen water.
4. Use an icicle.
5. Great, big icicles are hanging in the Ice Cave behind the waterfall.
6. Unfortunately, the melting icicle will slip out of your grasp before you can carry it to the lump...
7. ...unless you stop the icicle from melting too quickly.
8. Maybe you can refreeze the icicle. There are some places that are cold enough to do this.
9. High altitudes are cold.