Tenebris, Mechanical Disaster

Infect (This creature deals damage to creatures in the
form of -1/-1 counters, and to players in the form of
poison counters.)
{x}{t} Sacrifice a creature with converted mana
cost X, return target creature with converted
mana cost X from a graveyard to the battlefield
under your control, that creature is a black
artifact zombie in addition to it's other colors
and types.