This crafty loop turns a modest goblin horde into an unstoppable, mana-generating engine by closing the loop on untaps and sacrifices. You begin by tapping Krenko, Mob Boss to flood the board with new Goblin tokens, which are then fed directly into Phyrexian Altar to generate the exact mana needed for the next step. That mana is funneled into Seedcradle Witch to untap Krenko and grant a massive power boost, leaving you ready to tap the goblin master once more.