Crystal Spray

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.

Alters all occurrences of the chosen word in the text box and the type line of the given card.

It can be used to change a land’s type from one basic land type to another. For example, Forest can be changed to Island so it produces blue mana. It doesn’t change the name of any permanent.

You choose the words to change on resolution.

It can’t change a word to the same word. It must be a different word.