Nethroi, Apex of Death + Phyrexian Altar + Mitotic Slime + Hoverguard Sweepers

Nethroi, Apex of Death

Phyrexian Altar

Mitotic Slime

Hoverguard Sweepers

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 Hoverguard Sweepers and Mitotic Slime from your graveyard to the battlefield.
3. When Hoverguard Sweepers enters, it triggers, returning Nethroi from the battlefield to your hand.
4. Activate Phyrexian Altar twice by sacrificing Hoverguard Sweepers 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 clever loop uses Nethroi, Apex of Death's explosive mutate trigger to pull both Hoverguard Sweepers and Mitotic Slime straight out of your graveyard and onto the battlefield. As Hoverguard Sweepers enters, its ability bounces Nethroi right back to your hand so you can cast it all over again, while Phyrexian Altar stands ready to sacrifice the Sweepers and the cascading wave of tokens generated by Mitotic Slime for a continuous stream of colored mana. By feeding this chain of sacrifices and re-entries, you turn the death of the Ooze tokens into a self-sustaining engine that fuels your mana pool while generating infinite creature tokens and enters-the-battlefield triggers.