Yarus, Roar of the Old Gods + Master of the Veil + Phyrexian Altar

Yarus, Roar of the Old Gods

Master of the Veil

Phyrexian Altar

How it works

1. Activate Phyrexian Altar by sacrificing Master of the Veil, adding one mana of any color.
2. When Master of the Veil dies, Yarus' second ability triggers, returning Master of the Veil from your graveyard to the battlefield face down, then turning it face up.
3. Master of the Veil triggers, turning itself face down.
4. Repeat.

This clever loop relies on Yarus, Roar of the Old Gods to turn death into rebirth, transforming Phyrexian Altar from a simple sacrifice outlet into a perpetual motion machine. When you sacrifice Master of the Veil to the Altar for mana, Yarus intercepts the dying creature to return it face down and immediately flip it face up. That very face-up trigger lets Master of the Veil target itself, turning back face down so the cycle can begin anew. Thanks to Yarus granting your team haste, everything is ready to repeat instantly, generating infinite colored mana and endless sacrifice triggers.