Eiko, Translucid Lightfields

Eiko, Translucid Lightfields enters the battlefield tapped.
{t}: Add {c}. Activate only if you control an Aura.
Whenever mana produced by Eiko, Translucid Lightfields is spent to cast an Aura spell, you may
have it become a copy of that Aura as it enters
the battlefield, except it's still a land. It may
enchant another permanent.