Nortebak, of Shifting Kings

All legendary creature able to block Nortebak, of Shifting Kings do so.
Whenever a legendary creature dies or is put into a command zone, put a +1/+1 counter on Nortebak, of Shifting Kings
{b}{b}, Exile a legendary card from a graveyard: Nortebak, of Shifting Kings becomes a copy of target legendary creature on the battlefield or in a command zone until end of turn.