Alright, lets say your field is filled with aflatoxin. You play this, and then when you play another creature, you can sacrifice one of the cells.
When playing a deck with firefly queens, you'd be able to get rid of a firefly if needed, and it would work great if you are playing a death deck and the field is full of skeletons. Granted, it's a situational card, but its the only way around a fundamental rule of the game. I thought it would be good in some decks =/
