Demons or Angels

As long as you have a Demon or Angel in
Play, Demons or Angels Cost {1} less to Play.
{r/w}{r/w}{r/w}: Search The World for a Creature:
'Demon' or 'Angel' and Put it in Your Hand.
"Both Demons and Angels are Energetic Beings
without a physical body. They have a history of
getting summoned to do man's bidding." - Alexa