Ra's Al-Ghul, Demon's Head

Deathtouch, Fear.
When Ra's Al-Ghul enters the battlefield, create
X 1/1 black assassin creature tokens with
deathtouch, where X is the number of creature
cards in your graveyard.
{b}{g} discard a card: regenerate Ra's Al-Ghul.
{b}{g} discard a card: return Ra's Al-Ghul from
the graveyard to your hand.
"I will not rest, even in death, till the world
is at peace and humanity learns it place."