MTG >Combos >Nether Traitor +Phyrexian Altar +Lightning Greaves +Akki Ember-Keeper +

Attach Lightning Greaves to Nether Traitor Sacrifice Nether Traitor to add one black mana Akki-Ember Keeper will trigger, create a Spirit token Sacrifice the token to add one mana of any color Nether Traitor's ability will trigger, pay one black mana to return it to the battlefield Repeat the process.