Conjure Nightshade

Haste (This creature can attack and {t}
as soon as it comes under your control.)
When Conjure Nightshade enters the battlefield, you may sacrifice another creature.
When you do, Conjure Nightshade deals
damage equal to the sacrificed creature's
power to target player.
“I'll take nightshade herb with me”
—Douglas Bryan, "Restless Dead"