Goblin Warrens + Phyrexian Altar + Adrix and Nev, Twincasters

Goblin Warrens

Phyrexian Altar

Adrix and Nev, Twincasters

How it works

1. Activate Goblin Warrens by paying 2 and sacrificing two Goblins, creating six 1/1 Goblin creature tokens.
2. Activate Phyrexian Altar three times by sacrificing three Goblins, adding 2.
3. Repeat.

This loop turns a modest pile of Goblins into an engine of endless multiplication. Adrix and Nev, Twincasters provides the crucial replacement effect that doubles the output of your token production, meaning Goblin Warrens yields six Goblins instead of three for its sacrifice cost. By feeding just three of those newly minted tokens into Phyrexian Altar, you generate the exact amount of mana required to pay for the Warrens' activation again. You are left with a net gain of extra Goblin tokens with every single iteration, easily fueling infinite colored mana, sacrifices, and enter-the-battlefield triggers.