Artificial Evolution

{U} · Instant

Change the text of target spell or permanent by replacing all instances of one creature type with another. The new creature type can't be Wall. (This effect lasts indefinitely.)

Motor: se resuelve a mano

Rulings (9)

Alters all occurrences of the chosen word in the text box and the type line of the given card.
Wizards of the Coast · 2004-10-04
Can target a card with no appropriate words on it, or even one with no words at all.
Wizards of the Coast · 2004-10-04
Changing the text of a spell will not allow you to change the targets of the spell because the targets were chosen when the spell was cast. The text change will (probably) cause it to be countered since the targets will be illegal.
Wizards of the Coast · 2004-10-04
If a creature's creature type has been changed by a spell or ability, changing the card's text won't affect or alter the new creature type.
Wizards of the Coast · 2004-10-04
If you change the text of a spell which is to become a permanent, the permanent will retain the text change until the effect wears off.
Wizards of the Coast · 2004-10-04
It can't change a word to the same word. It must be a different word.
Wizards of the Coast · 2004-10-04
It only changes what is printed on the card (or set on a token when it was created or set by a copy effect). It will not change any effects that are on the permanent.
Wizards of the Coast · 2004-10-04
You can't change proper nouns (i.e. card names) such as “Island Fish Jasconius”.
Wizards of the Coast · 2004-10-04
You choose the words to change on resolution.
Wizards of the Coast · 2004-10-04