Alara Reborn: Bloodbraid Elf
|Type:||Creature - Elf Berserker|
Cascade (When you cast this spell, exile cards from the top of your library until you exile a nonland card that costs less. You may cast it without paying its mana cost. Put the exiled cards on the bottom in a random order.)
Bloodbraid Elf has the potential to enable so much value in any deck that it's included in. Behind on board? How about free Tarmogoyfs, Baleful Strix, Hymn to Tourachs, and Liliana of the Veils!