Nim Deathmantle + Phyrexian Altar + Peregrine Drake

Nim Deathmantle

Phyrexian Altar

Peregrine Drake

How it works

1. Activate up to five lands by tapping them, adding at least 3.
2. Activate Phyrexian Altar by sacrificing Peregrine Drake, adding one mana of any color.
3. When Peregrine Drake dies, Nim Deathmantle triggers, returning Peregrine Drake from your graveyard to the battlefield, and attaching Nim Deathmantle to it.
4. When Peregrine Drake enters the battlefield, it triggers, untapping up to five lands.
5. Repeat.
6. If the lands can tap to produce at least 4, this combo nets infinite mana.

This loop transforms the humble Peregrine Drake into an endless engine of profit by exploiting its own entry trigger. Whenever you sacrifice the Drake to the mana-generating sacrifice outlet of Phyrexian Altar, its death immediately pays for and triggers Nim Deathmantle's resurrection ability. As the Drake returns to the battlefield, its enter-the-battlefield ability untaps your lands, providing the exact funds needed to keep the cycle spinning infinitely while netting extra mana along the way.