Abandoned Sarcophagus + Humility + Hollow One + Ashnod's Altar

Abandoned Sarcophagus

Humility

Hollow One

Ashnod's Altar

How it works

1. Cast Hollow One either from your hand or from your graveyard by paying at most 1.
2. Activate Ashnod's Altar by sacrificing Hollow One, adding CC.
3. If you cast Hollow One from your graveyard, Hollow One is not exiled by Abandoned Sarcophagus due to Humility removing Hollow One's cycling ability.
4. Repeat.

This clever loop relies on Humility to strip Hollow One of its printed cycling ability entirely, turning off the exile replacement effect normally imposed by Abandoned Sarcophagus. Because the card is no longer recognized as having cycling, you are free to repeatedly cast Hollow One from your graveyard for a fraction of its mana cost, often fueled by the refunds you get along the way. Each time your recursive creature hits the battlefield, you can immediately feed it to Ashnod's Altar to harvest infinite colorless mana alongside an endless chain of sacrifice and death triggers.