Siege of Towers

Oracle Text

Replicate 1R (When you cast this spell, copy it for each time you paid its replicate cost. You may choose new targets for the copies.)

Target Mountain becomes a 3/1 creature. It's still a land.

Card Rulings

2/1/2006 The Mountain will remain a creature for the rest of the game. It doesn’t have a creature type.
8/1/2008 A noncreature permanent that turns into a creature can attack, and its abilities can be activated, only if its controller has continuously controlled that permanent since the beginning of his or her most recent turn. It doesn’t matter how long the permanent has been a creature.