Look into thy magic eye of snow. There you will find the answer.
11 seconds sound clip from the Rudolph and Frosty: Christmas in July movie soundboard.
You can hear this line at 00:18:41 in the Blu-ray version of the movie.
Quote context
[...]
- The memory of Lady Boreal still glows here, and protects him.
- He must be made to leave the North Pole.
- He sets forth but once a year. Christmas Eve.
- I cannot wait! There must be a way to make him leave now!
- Help me, O Genie of the Ice Scepter.
- Look into thy magic eye of snow. There you will find the answer.
- What's this? A balloon? How can a hot-air balloon help me lure Rudolph away?
- Who?
- The flying ice cream man. He keeps his stock up here, where it won't melt.
[...]