The text should probably read:
: Remove two cards from
each player's graveyard. Play this ability only once each turn and only if there are at least two cards in each player's graveyard.
I like this idea. It takes a black card, like Withered Wretch, and gives it a white spin by making it affect everybody. I think you could make it a little bit more powerful, though. You could remove either of the restrictions and it would still be okay, I think. If you remove the "only once each turn" clause, there's a wording (I don't remember how it goes) that means that the ability fails upon resolution if the condition isn't met at that time, as well as when you pay for it.
I'm not really sure what the flavour text is supposed to mean. It definitely seems out of white's flavour for it to
claim the dead. The bit about "the package" doesn't really make any sense at all.
