Prerequisites
- Athreos, Shroud-Veiled on the battlefield
- Ugin's Nexus on the battlefield
- Karn, Silver Golem on the battlefield
- Nahiri's Resolve on the battlefield
- Phyrexian Altar on the battlefield
- each turn available
Steps
- Activate Karn by paying , causing Ugin's Nexus to become an artifact creature until end of turn
- At the beginning of your end step, Athreos' second ability and Nahiri's Resolve trigger
- Resolve the Athreos trigger, putting a coin counter on Ugin's Nexus
- Holding priority, activate Phyrexian Altar by sacrificing Ugin's Nexus, adding one mana of any color
- Ugin's Nexus is exiled instead of being put into your graveyard, causing you to take an extra turn after this one
- Athreos' third ability triggers, causing you to return Ugin's Nexus from exile to the battlefield
- Resolve the Nahiri's Resolve trigger from step 2, exiling Ugin's Nexus until your next upkeep
- Move to your extra turn
- At the beginning of your upkeep, Nahiri's Resolve triggers, returning Ugin's Nexus from exile to the battlefield
- Repeat
Results
Required Cards 5
Athreos, Shroud-Veiled
Legendary Enchantment Creature — God
Ugin's Nexus
Legendary Artifact
Karn, Silver Golem
Legendary Artifact Creature — Golem
Nahiri's Resolve
Enchantment