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.
2004-10-04
If you have zero or negative life, half your life is zero, so it costs nothing to use the ability.
2004-10-04
When it turns into a creature, it is no longer an enchantment.
Legalitet:
Standard: Ej legal
Pioneer: Ej legal
Modern: Ej legal
Legacy: Legal
Vintage: Legal
EDH / Commander: Legal
Pauper: Ej legal
Explorer: Ej legal
Historic: Ej legal
Brawl: Ej legal
Premodern: Legal
93/94: Ej legal