Interesting new card spoiled over at MTGSalvation:
http://forums.mtgsalvation.com/showthread.php?t=385825Tragic SlipB
Instant
Target creature gets -1/-1 until end of turn.
Morbid - That creature gets -13/-13 until end of turn if a creature died this turn.
I find it interesting because creatures in Vintage that are not named Tarmogoyf seem to fall into two categories, both of which this can deal with:
(1) Bob, Tiago, pre-flip Delver and most of Noble Fish' creatures without assistance.
(2) Blightsteel Colossus with the ability to kill something else.
Obviously, this kind of card only works in a deck with lots of creatures and probably a sac outlet. As a certain important someone has said, creatures in Vintage usually don't die - they get exiled, bounce, etc. But, with Grafdigger's Cage, maybe we will see a surge in creature decks anyway?
Comparing it to other similar one-drops: I think this card compares slightly unfavorably to Curfew, which is a card I think is criminally underplayed for how good it is. Its also slightly less good than Darkblast at dealing with x/1s, but if you're already running Snapcaster anyway to flash it back... I dunno. And, of course, it's hella worse than Swords to Plowshares or Path to Exile. And, if you're dealing with BSC, killing it shuffles it so it's ready to be tinkered up again off a Snapcaster, so there is that.
Still. I wonder if this has a home in a deck without access to white and that needs a critically low curve. B/R gobbos or something, as a replacement for that Goblin-tribal Diabolic Edict thingiee? The fact that it costs 1 less mana might be critical in keeping gobbos fast enough while still giving them an answer to creatures?