Melissa, Natures Savior

+1: Create a 1/1 Gnome Artifact Creature token and search your library for a land card, put that card into your hand and shuffle your library.
-3: Exile target creature, add X manna of any 1 color to your manna pool, where X is the toughness of the exiled creature.
-8: Exile any number of lands you control. Melissa deals X damage to target creature or player, where X is twice the number of exiled lands.