Pow-Pow

Equipped creature gets +2/+0 and reach and
"when this creature is attacking, it deals 1 damage
to every creatures target opponent controls."
Equip {4}, {2} if equipped creature is an artificer
Channel — {3}, discard Pow-Pow: deal 1 damage
to every creature an opponent control.
Guns don't kill people. I mean, until you shoot them.
Then they kill everything!