Blackrazor

Equipped creature gets +3/+0 and has haste,
trample, and "Whenever this creature or
Blackrazor destroys another permanent
it gains X +0/+1 counters where X is the
destroyed permanent's mana cost"
{b}{b}{b}: Other target equipment deals damage
to a creature its equipped to equal to its mana cost.
Equip: {5}