Crypt Ghast
623c9804-42c4-4b69-bc39-f70d96929d07
$2.39 CND
Extort (Whenever you cast a spell, you may pay {W/B}. If you do, each opponent loses 1 life and you gain that much life.)
Whenever you tap a Swamp for mana, add {B} to your mana pool (in addition to the mana the land produces).