Unmake into Dust

Kicker {1}{w}{u}{b} (You may pay an additional {1}{w}{u}{b} as you cast this spell.)
Target opponent reveals his or her hand and you may choose a card from it. Exile that card. Exile target permanent that player controls. Exile any number of cards from that player's graveyard. Search that player's library for five cards and exile them.
If Unmake into Dust was kicked, repeat this process for each opponent.