Isochron Scepter + Shallow Grave + Corridor Monitor + Ashnod's Altar

Isochron Scepter

Shallow Grave

Corridor Monitor

Ashnod's Altar

How it works

1. Activate Ashnod's Altar by sacrificing Corridor Monitor, adding CC.
2. Activate Isochron Scepter by paying 2 and tapping it, casting a copy of Shallow Grave without paying its mana cost.
3. Resolve Shallow Grave, returning Corridor Monitor from your graveyard to the battlefield.
4. Corridor Monitor enters the battlefield, untapping Isochron Scepter.
5. Repeat.

This elegant loop transforms Isochron Scepter into an engine of endless resurrection by hosting Shallow Grave beneath its imprint, letting you repeatedly dredge up the dead for a mere two mana. When Corridor Monitor hits the battlefield from the graveyard, its trusty enter-the-battlefield trigger untaps the Scepter so the cycle can begin anew. Meanwhile, Ashnod's Altar stands ready to harvest the Monitor each time, providing the exact colorless mana needed to activate the Scepter again while fueling an infinite stream of sacrifice and death triggers.