Ice Goku!!
This is very difficult to do. While fighting Freeza's brother, and he's about to die, activate your super sayan power. Get behind him so you can't see yourself. Punch him till he dies. When he falls over dead, you will have Freeza's brother's skin on, whick looks like Sub'Zero froze you. Sadly, when you leave the cave, you will lose your new look. Try your heart out to get this done!
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