Ugin's Nexus + Isochron Scepter + Vision Charm + Mechanized Production

Prerequisites

• Mechanized Production attached to Ugin's Nexus.

Steps

1. 1At the beginning of your upkeep, Mechanized Production triggers, creating a token copy of Ugin's Nexus.
2. 2Put the Ugin's Nexus token into your graveyard due to the legend rule.
3. 3The Ugin's Nexus token is exiled instead of being put into your graveyard, causing you to take an extra turn after this one.
4. 4Activate Isochron Scepter by paying and tapping it, casting a copy of Vision Charm without paying its mana cost.
5. 5Resolve the copy of Vision Charm, causing Ugin's Nexus to phase out until your next untap step.
6. 6Move to your next turn, causing Ugin's Nexus to phase in during your untap step.
7. 7Repeat.

Effects

• Infinite turns
• Lock