Hidden Ancients

Enchantment    (CMC:2)

When one of your opponents successfully casts an enchantment spell, if Hidden Ancients is an enchantment, Hidden Ancients becomes a 5/5 creature that counts as a Treefolk.

The only alert the invaders had was the rustling of leaves on a day without wind.

260 UZ • ENDaren Bader

™ & © 1993—1998 Wizards of the Coast

Legal in: Urza Block,Legacy,Vintage,Commander

Oracle Text (click to copy):

Hidden Ancients {1}{G} Enchantment When an opponent casts an enchantment spell, if Hidden Ancients is an enchantment, Hidden Ancients becomes a 5/5 Treefolk creature.

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10/4/2004
When it turns into a creature, it is no longer an enchantment.
10/4/2004
It changes into a creature even if the spell is countered.
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.

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Card Hidden Ancients is not on TCGPlayer.