Atho, Shadow Sorcerer

Flash, flying
When Atho, Shadow Sorcerer enters the
battlefield, for each card you discarded this turn,
create a 3/3 black Nightmare Horror creature
token with "At the beggining of your upkeep you
lose 3 life.".
Whenever a spell you control or an ability of a
permanent you control would cause you to lose
life, draw a card.