Most importantly, neither can your opponents if you exile their creatures, making this a fantastic white finisher or protection spell, depending on your circumstances #22
Modern and Pioneer might be interested too, especially if we think of Dismember being 1B and 2 life for -5/-5
I think what makes the card fine for Modern is that the creatures are powerful enough to keep it in check, while it lacks Swords to Plowshares that Legacy has to let you protect Jace
Finally, I could rant on how poor a plan it is to rely on opponents with Zenith ChroniclerZenith Chronicler, but why do that when I could instead harp on just how good Undead ButlerUndead Butler is
It looks like the design team anticipated this cards popularity because Bloodthirsty Conquerer got the Showcase treatment
I think we can push the matter a little further by going into other colors