The rules are simple, all you need to do is create a DC themed deal that seems sweet at first but has a terrible price. Others in the thread will have to decide if that’s a price they are set to pay.
To begin, you have all of Zatanna’s magic and mystic knowledge, but you can only speak, write, and sign backwards. No one will be able to easily understand you.
You can have all of Lex’s riches, luxury, IQ, knowledge. But every day for the rest of you’re life you have to fight superman without the existence of kryptonite. Deal or no deal?