Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
```
you may not assign or delegate any rights or obligations under the terms of service or privacy policy without supercell 's prior written consent , and any unauthorized assignment and delegation by you is ineffective . 

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. OPTIONS: ["Unilateral change", "Arbitration", "None", "Limitation of liability", "Choice of law", "Content removal", "Jurisdiction", "Unilateral termination", "Contract by using"].