Transmute

Transmute is the keyword ability of cards in Ravnica block aligned with the Dimir guild.

Description
Transmute works by allowing a player to pay the transmute cost of a given card, discarding the card, then searching their library for a card with the same converted mana cost as the discarded card.

Transmute was created by Aaron Forsythe. It appears only on Black and Blue cards. There are no limitations on the cost, but all printed Transmute costs are three mana, two of which are colored: either, , or.

Unlikely to return
R&D have soured on Tutoring mechanics as they make games play out too similarly. Individual tutors are considered to be fine, but they don't currently plan to do whole mechanics like Transmute, anymore.

Rulings

 * If you transmute a card with mana cost, for example, you can search for any card in your library with converted mana cost 2. It doesn't matter what type or colors that card is.
 * You don't need to have another card with the same converted mana cost in your library to activate the transmute ability, and you don't need to find a card even if there is one.