Hellfire Shotgun

Flash (You may cast this spell any time you could
cast an instant.)
When Hellfire Shotgun enters the battlefield,
attach it to target creature you control.
Equipped creature gets +4/+0 and has reach.
(It can block creatures with flying.)
Equip {p/r} ({p/r}: Attach to target creature you control.
Equip only as a sorcery.)