Cass, Hand of Vengeance + Phyrexian Altar + Ajani's Chosen

Cass, Hand of Vengeance

Phyrexian Altar

Ajani's Chosen

How it works

1. Activate Phyrexian Altar by sacrificing another creature that has an Aura attached to it.
2. When the creature dies, Cass triggers, returning an Aura that was attached to the creature from your graveyard to the battlefield attached to another creature you control.
3. When the Aura enters the battlefield, Ajani's Chosen triggers, creating a creature token.
4. Repeat.

This loop sets up a self-sustaining engine where Cass, Hand of Vengeance acts as the graveyard recycling core, converting each death into a returning Aura. As that Aura re-enters the battlefield, Ajani's Chosen seizes the moment to continually forge fresh 2/2 Cat tokens, keeping your board populated with fodder. Meanwhile, Phyrexian Altar provides the crucial sacrifice outlet that triggers Cass in the first place while turning your endless cycle of creatures into an infinite supply of colored mana.