Abandoned Sarcophagus + Infinite Reflection + Phyrexian Altar + Hollow One

Abandoned Sarcophagus

Infinite Reflection

Phyrexian Altar

Hollow One

How it works

1. Cast Hollow One either from your hand or from your graveyard by paying at most 1, causing it to enter the battlefield as a copy of the creature with Infinite Reflection attached.
2. Activate Phyrexian Altar by sacrificing Hollow One, adding one mana of any color.
3. If you cast Hollow One from your graveyard, Hollow One is not exiled by Abandoned Sarcophagus due to Infinite Reflection removing Hollow One's cycling ability.
4. Repeat.
5. If you have discarded three or more cards this turn, this combo nets infinite colored mana.

This clever loop turns the graveyard into a recurring resource by pairing Hollow One with Abandoned Sarcophagus, which normally would exile any un-cycled card headed to the graveyard unless something intervenes. That intervention comes from Infinite Reflection, whose copy effect strips Hollow One of its native cycling ability so it safely hits the graveyard rather than exile. Once there, Abandoned Sarcophagus lets you recast it, and because you've met the discard requirement to reduce its cost, you can funnel it straight into Phyrexian Altar to generate infinite colored mana, sacrifices, and entry triggers.