Muldrotha, the Gravetide + Wormfang Manta + Torpor Orb + Phyrexian Altar

Muldrotha, the Gravetide

Wormfang Manta

Torpor Orb

Phyrexian Altar

How it works

1. Activate Phyrexian Altar by sacrificing Wormfang Manta, adding .
2. When Wormfang Manta dies, its second ability triggers, causing you to take an extra turn after this one.
3. Cast Wormfang Manta by paying 5.
4. Wormfang Manta's first ability does not trigger when it enters the battlefield due to Torpor Orb.
5. Repeat each turn.

This ingenious loop relies on turning Wormfang Manta's greatest drawback—skipping your turns—into an infinite sequence by turning off its enters-the-battlefield trigger with Torpor Orb. Once the Orb suppresses that downside, sacrificing Wormfang Manta to Phyrexian Altar generates mana and cleanly triggers its leaves-the-battlefield ability to grant you an extra turn. Finally, Muldrotha, the Gravetide steps in as the ultimate engine, letting you recast the creature directly from your graveyard turn after turn to sustain the infinite lock.