Spawning Pit + Ojer Taq, Deepest Foundation // Temple of Civilization + Phyrexian Altar

Spawning Pit

Ojer Taq, Deepest Foundation // Temple of Civilization

Phyrexian Altar

How it works

1. Activate Spawning Pit's second ability by paying 1 and removing two charge counters from it, creating three 2/2 Spawn artifact creature tokens.
2. Activate Phyrexian Altar by sacrificing a Spawn, adding 1.
3. Activate Spawning Pit's first ability twice by sacrificing two Spawns, putting two charge counters on Spawning Pit.
4. Repeat.

This engine relies on Ojer Taq, Deepest Foundation's replacement effect to heavily multiply your token generation, turning a single pair of charge counters into a surplus of creature tokens. You use Phyrexian Altar to sacrifice those generated creatures for the mana needed to fuel Spawning Pit's activation, while simultaneously feeding the Spawning Pit with more charge counters through those very same sacrifices. By cycling the Spawn tokens back into the Spawning Pit and cashing them out for mana, you loop the entire process to generate infinite death, sacrifice, and entry triggers.