Nightshade Harvester

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