"Ash is our air, darkness our flesh."
—Phyrexian Scriptures

Lurking Evil

Pay half your life, rounded up: This enchantment becomes a 4/4 Phyrexian Horror creature with flying.

Vintage Masters

Pay half your life, rounded up: Lurking Evil becomes a 4/4 Horror creature with flying.

"Ash is our air, darkness our flesh."
—*Phyrexian Scriptures*

Urza's Saga

Pay half your life, rounded up: Lurking Evil becomes a 4/4 creature with flying that counts as a Horror.

If you have zero or negative life, half your life is zero, so it costs nothing to use the ability.

When it turns into a creature, it is no longer an enchantment.

A noncreature permanent that turns into a creature can attack, and its {T} abilities can be activated, only if its controller has continuously controlled that permanent since the beginning of their most recent turn. It doesn't matter how long the permanent has been a creature.