Long Feng, Grand Secretariat + Thopter Squadron + Phyrexian Altar

Long Feng, Grand Secretariat

Thopter Squadron

Phyrexian Altar

How it works

1. Activate Thopter Squadron by paying 1 and removing a +1/+1 counter from it, creating a creature token.
2. Activate Phyrexian Altar by sacrificing the creature token, adding 1.
3. When the creature token dies, Lord Feng triggers, putting a +1/+1 counter on Thopter Squadron.
4. Repeat.

This loop transforms Thopter Squadron into a self-sustaining engine by leveraging Phyrexian Altar to turn its own children into fuel; you spend one mana and remove a counter to hatch a Thopter token, sacrifice that token to the Altar for the mana you just spent, and let Long Feng, Grand Secretariat notice the token's demise to effortlessly replenish the +1/+1 counter you started with. Because Long Feng, Grand Secretariat triggers off the token being put into a graveyard from the battlefield, every single iteration nets you endless sacrifice, death, and entry triggers while keeping Thopter Squadron's counter count stable. It is a wonderfully self-contained cycle that converts raw tokens into infinite magical energy through Phyrexian Altar's sacrificial grace.