Lighting Cube

You may have Lightning Cube enter the
battlefield as a copy of an enchantment or artifact
on the battlefield, taking all abilities
and adding {t}: Deal 1 damage to target creature
or player. If it's an enchantment, it
is now an artifact.
{t}: Deal 1 damage to target creature or player. If
the creature or player would die, you may activate
this ability for a second time for free