Gul'dan

When Gul'dan enters the battlefield create a
1/1 red Demon creature token with Haste,
a 2/2 black Demon creature token with
First Strike, and a 3/3 green Demon
creature token with Vigilance.
When Gul'dan dies create a Legendary Artifact
token named Skull of Gul'dan with
"{t} Sacrifice this token. Add
{r}{b}{g} to your mana pool".