Lightning Abyss

Unless opponents control 3 or more creatures,
Lightning Abyss isn't a creature.
When Lightning Abyss enters the battlefield,
target opponent reveals and draws a card. If
that card was legendary, put it onto the
battlefield under your control. Otherwise,
put it at the bottom of opponents library.
{u}{b}, {t}: Target creature gains Indestructible.
Activate this ability only during opponents turn.