Forum:Tribute light and darkness

Okay. Can I tribute Light and Darkness Dragon for a card like Eradicator Epidemic Virus, or would he negate it. I would think that since it's effect doesn't activate until a sacrifice is made, so since Light and Darkness is being tributed for that effect, Light and Darkness wouldn't get the chance to use his effect. But I want to make certain. What's the call? Land of dogs 00:06, February 5, 2010 (UTC)