Revenant Storm

Kicker {2}{w}{b}{b}{g}
If this spell was kicked, each player reveals their
hand and discards each creature card revealed
this way.
Exile all cards from all graveyards. Each player
creates an X/X black Elemental creature token,
where X is the number of creature cards exiled
this way. Those tokens have flying and "At the
beginning of your upkeep, sacrifice a creature."