Ebnid, Dubious Dwarf

+1: Each player exiles the top card of their library face down. You may have any number of players turn their card face up and put it in their hand.
-3: Each player reveals the top five cards of their library, puts all land cards revealed this way onto the battlefield tapped, and exiles the rest.
-7: Exile all permanents. Exile all cards from all graveyards and hands. Each player's life total becomes 1. Take an extra turn after this one.