Decaying Soil + Phyrexian Altar + Kobolds of Kher Keep

Decaying Soil

Phyrexian Altar

Kobolds of Kher Keep

How it works

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

This clever loop turns a graveyard full of fodder into a churning engine, taking full advantage of Decaying Soil once its threshold ability is turned on. By utilizing Kobolds of Kher Keep, you have a creature whose zero-mana cost allows it to be continuously re-cast after being fed directly to Phyrexian Altar. The altar converts each sacrifice into the exact mana needed to pay Decaying Soil's upkeep-triggered return cost, creating a perpetual motion machine that generates infinite storm count, death triggers, and sacrifice counts.