Sporoloth Ancient + Fungal Bloom + Phyrexian Altar + Pir, Imaginative Rascal + Elspeth, Storm Slayer

Sporoloth Ancient

Fungal Bloom

Phyrexian Altar

Pir, Imaginative Rascal

Elspeth, Storm Slayer

How it works

1. Activate Fungal Bloom by paying , putting two spore counters on a Fungus you control.
2. Activate a Fungus by removing two spore counters from it, creating two 1/1 Saproling creature tokens.
3. Activate Phyrexian Altar twice by sacrificing two Saprolings, adding .
4. Repeat.

This loop relies on the counter-doubling prowess of Pir, Imaginative Rascal to turn Fungal Bloom's targeted investment into a surplus of spore counters, which Sporoloth Ancient and other Fungi can cash in to generate Saproling tokens. Thanks to Elspeth, Storm Slayer doubling every token creation event, a single activation of your Fungi produces double the Saprolings, fueling Phyrexian Altar to churn out infinite mana and sacrifices. With Sporoloth Ancient passively granting the necessary activation ability to your entire team, the whole engine sustains itself indefinitely for endless death and trigger loops.