Jars of screaming souls

Haste, flash
Whenever a creature your opponent
controls would die, you may pay {3}, attach that creature to jars of screaming
souls as if it were an enchantment
{p/w}{p/w}, {t}: gain control of target
creature attached to jar of screaming souls
{w}{w}{w}{w}, {t} gain life equal to
converted mana cost of a card attached to
jars of screaming souls, exile that card