You need to use a card whos ability/bonus is - ? opp life, min ? to remove your opponents life in survivor mode e.g Berzerk.
Thats ok. I answer this question ever Ld release nearly
One more question,does it have to be a character from resuce clan or any other clans??? If you know what i mean...
Well, seeing as Rescue clan doesn't have one.... [Fill in the blank]
It doesn't have to be from the rescue clan