Dream Stealer

: When played you get an emblem with "You may play cards exiled with Dream Stealer & spend mana as though it were mana of any color to cast them"
+1: Exile the top 3 cards of your library or exile the top card of each player's library and you lose 1 life for each of your opponents cards exiled.
-3: Exile target creature, artifact or enchantment & lose life equal to said card's mana cost or exile the top 3 cards of each opponent's library.