Blood Feud

When Blood Feud enters the battlefield, place
a feud counter on target creature an opponent controls. Whenever enchanted creature attacks, creatures with a feud token on them must block enchanted creature if able.
Enchanted creature gets +1/+0. When the
creature with a feud counter is destroyed,
sacrifice Blood Feud and draw a card.
If ever again we draw breath in the same room, one
breath shall cease.