Worldpurge
Sorcery, {4}{W/U}{W/U}{W/U}{W/U}
Oracle Text
Return all permanents to their owners' hands. Each player chooses up to seven cards in their hand, then shuffles the rest into their library. Each player loses all unspent mana.
Sorcery, {4}{W/U}{W/U}{W/U}{W/U}