Cheapest priced copy (Chronicles): $0.35 at Card Kingdom, near mint, their price list as of .
Metamorphosis 
Sorcery · Common · Chronicles · #66
As an additional cost to cast this spell, sacrifice a creature.
Add X mana of any one color, where X is 1 plus the sacrificed creature's mana value. Spend this mana only to cast creature spells.
Legal inCommanderLegacyVintagePauper
Not legal inBrawlStandardPioneerModern
4 printings · $0.35 to $7.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Arabian Nights | 51 | Common | $7.99 | — |
| Chronicles Foreign Black Border | 66 | Common | — | — |
| Chronicles | 66 | Common | $0.35 | — |
| Rinascimento | 130 | Common | — | — |
3 rulings from Wizards of the Coast
- 4 October 2004This mana may be used on additional costs to cast the spell, such as Kicker.
- 15 April 2013Players can only respond once this spell has been cast and all its costs have been paid. No one can try to destroy the creature you sacrificed to prevent you from casting this spell.
- 15 April 2013You must sacrifice exactly one creature to cast this spell; you cannot cast it without sacrificing a creature, and you cannot sacrifice additional creatures.