Nerix, Mirror Mage

The 'Legend rule" doesn't apply to permanents
you control.
{2}: Exile any number of target untapped
permanents you control. You lose 2 life for each
card exiled this way beyond the first. Return
them to the battlefield at the beginning of your
next upkeep. When one or more permanents
enter the battlefield this way, create a tapped
token that's a copy of each of them. Activate
this ability only during your upkeep.