Raging Dragoncock

When Raging Dragoncock enters the battlefield,
target player sacrifices a creature unless he has
Raging Dragoncock deal 4 damage to him.
Enrage - Whenever Raging Dragoncock is dealt
damage, target player sacrifices a creature unless
he has Raging Dragoncock deal 4 damage to him.
"Nothing quite like the sight of a young dragon-
cock, frying its unhatched siblings for lunch"
- scarred wanderer