Rowena, Witch overlord

When Rowena, Witch overlord enters
the battlefield from your hand create
X Magic tokens with "sacrifice this
for 2 mana of any color"
{u}{2}: tap target creature it doesn't
untap in its controllers untap step
{r}{2}: deal 4 damage to any target
{x}: create X Magic tokens
Sacrifice 7 magic tokens search your
Deck for Crowley, lord of Hell and
put it in your hand