Thief of Hope is a common Creature — Spirit card from Modern Masters 2015 (MM2), collector number 100. Current market price: $0.32 (foil $0.29), TCGplayer market prices via Scryfall.
Whenever you cast a Spirit or Arcane spell, target opponent loses 1 life and you gain 1 life. Soulshift 2 (When this creature dies, you may return target Spirit card with mana value 2 or less from your graveyard to your hand.)