Note that no particular effect is worth a card, but between an Essence Scatter, a Sinkhole, a Disenchant, and lifegain, this card covers all your bases
However, tokens that are sent to the graveyard still count as having died even though they cease to exist after leaving the battlefield
This sweeper is selective, allowing the controller to choose what to take out, to maximize its effect on the opponent and avoid removing friendly permanents
If heroic ever returns (and I believe its chances are good), this card hints at where we might evolve the mechanic
So what to choose instead
But they haven't bothered to make the rest of The Mane 6, so I took matters into my own hands, and made variants from the Unset series of cards