Dyana, Sylvan Betrayer

+2: Add two mana of different colors. Spend this mana only to cast a spell that targets an Elf.
0: Create a 1/1 green Elf creature token with Prowess. You lose 2 life.
-8: You get an emblem with "Sacrifice a nontoken Elf: This emblem deals 3 damage to any target."