Many-Faced-Snake

Create half of {x} exact copies of this card.
When this card or one of these copies die,
sacrifice all of these copies and this card.
If a copy or this card is changed in any way,
apply this change to all copies and this card.
If less than {8} was spent to cast this card, it gains
haste. When a copy of this card leaves the battlefield, sacrifice this card. When this card
leaves the battlefield, sacrifice all copies of it.