Sorcery, G (1) As an additional cost to play Metamorphosis, sacrifice a creature. Add X mana of any one color to your mana pool, where X is one plus the sacrificed creature's converted mana cost. Spend this mana only to play creature spells.1
Illus. Christopher Rush
The creature is sacrificed at the time this spell is announced. It is part of the cost. You cannot sacrifice more than one creature. [D'Angelo 1999/01/31]
The mana generated by this spell must be used to play creatures or you take mana-burn damage. You can however split it up among multiple creature spells or add to it from other mana sources. [Arab FAQ 1994/01/05]
You can spend the mana to pay alternate costs (like Kicker) and modified costs (like Gloom). [DeLaney 2003/01/14]
You cannot spend any of the mana to pay unrelated costs from effects (like Power Sink and Nether Void). [DeLaney 2003/01/14]
Extended tournaments (see Rule 803) have banned this card since 1999/10/01.
Chronicles
(Common)