If you have two other Nazgls in play and play a third, each gets three +1/+1 counters: one from the two already on the battlefield and the third from the third entering
We also owe an incredible amount to the community for crowdsourcing card origins and lore, so please feel free to send me your feedback or details on anything you think I may have missed at [email protected]
If your commander has a converted mana cost of three, casting it a second time will cost a total of five mana, and then seven, and so on
His two triggers generate both mana and cards, potentially in large quantities, and the deckbuilding and gameplay hoops he asks us to jump through are manageable
Both trigger when one of the own creatures dies
Search your library for a creature card with mana value equal to 1 plus the sacrificed creatures mana value, put that card onto the battlefield with an additional +1/+1 counter on it, then shuffle