Nethroi, Apex of Death + Phyrexian Altar + Mitotic Slime + Dream Stalker

Nethroi, Apex of Death

Phyrexian Altar

Mitotic Slime

Dream Stalker

How it works

1. Cast Nethroi either from your hand or from the command zone for its mutate cost by paying 4G/W, putting it under a non-Human creature you control.
2. Nethroi triggers, returning Dream Stalker and Mitotic Slime from your graveyard to the battlefield.
3. When Dream Stalker enters, it triggers, returning Nethroi from the battlefield to your hand.
4. Activate Phyrexian Altar twice by sacrificing Dream Stalker and Mitotic Slime, adding .
5. When Mitotic Slime dies, it triggers, creating two 2/2 Ooze creature tokens.
6. Activate Phyrexian Altar twice by sacrificing the Oozes, adding 1G/W.
7. When the Oozes die, they trigger, creating four 1/1 Ooze creature tokens.
8. Activate Phyrexian Altar three times by sacrificing three Oozes, adding 3.
9. Repeat.

This elegant loop turns Nethroi, Apex of Death into an infinite recursion engine by exploiting its powerful mutate trigger to pull Mitotic Slime and Dream Stalker straight from your graveyard to the battlefield. Once Dream Stalker enters, its mandatory bounce ability neatly returns Nethroi back to your hand so you can restart the whole process, while Phyrexian Altar provides the sacrifice outlet needed to generate a steady stream of colored mana. Meanwhile, Mitotic Slime's built-in death triggers provide the sacrificial Ooze tokens required to continuously feed the Altar and fund your mana pool.