Neuromancer

When Neuromancer enters the battlefield or attacks, you may sacrifice a creature with converted mana cost 1 or less. If you do, draw cards equal to its toughness. If a creature named Test Subject was sacrificed this way, exile it and Neuromancer, then return them to the battlefield melded under your control.
"He's ex-Simic, but he's not too shabby and I think
we can trust him."
-- Niv-Mizzet