Malenia, Deadly Waterfall

0: You deals 1 damage to each creature, you gain 1 life, Malenia gets the number of loyalty counters equal to amount of damage inflicted this way
-1: Malenia deals 1 damage to the target opponent, then 2 damage to the target planeswalker, then 3 damage to the target creature
-4: Exile the top three cards of your library, you may cast them in any of your turns