Decaying Soil + Phyrexian Altar + Crookshank Kobolds

Decaying Soil

Phyrexian Altar

Crookshank Kobolds

How it works

1. Cast Crookshank Kobolds by paying 0.
2. Activate Phyrexian Altar by sacrificing Crookshank Kobolds, adding 1.
3. When Crookshank Kobolds dies, Decaying Soil triggers, causing you to pay 1 to return Crookshank Kobolds to your hand from your graveyard.
4. Repeat.

This clever little loop relies on Crookshank Kobolds costing zero mana to cast, allowing you to cycle it endlessly through the graveyard with the help of Phyrexian Altar and Decaying Soil. Once you've crossed the threshold requirement so that Decaying Soil can trigger upon a creature's death, you can use the mana generated by sacrificing the Kobolds to Phyrexian Altar to pay the enchantment's recovery cost. Because the creature returns directly to your hand for the exact amount of mana it takes to sacrifice it, you create an infinite engine of death, sacrifice, and entry triggers.