Umbra

Equipped creature gets +3/+0, and has first
strike, trample, and vigilance.
(When the equipped creature attacks, if a
blocking creature your opponent controls
would be put into the graveyard, Exile it,
and create a 2/2 black spirit creature token.)
Equip {b}{b}{b}
The sword known as Umbra, had a particular
affinity for taking the souls of its wielders and of
those it fells in battle.