Color Identity: r, w, b

Prerequisites

  1. All permanents on the battlefield
  2. ({1} magic symbol)   available each turn

Steps

  1. Activate
    Karn, Silver Golem
    Karn     by paying ({1} magic symbol)  , causing
    Ugin's Nexus
    Ugin's Nexus     to become an artifact creature until end of turn
  2. At the beginning of your end step,
    Athreos, Shroud-Veiled
    Athreos    ' second ability and
    Nahiri's Resolve
    Nahiri's Resolve     trigger
  3. Resolve the
    Athreos, Shroud-Veiled
    Athreos     trigger, putting a coin counter on
    Ugin's Nexus
    Ugin's Nexus
  4. Holding priority, activate
    Phyrexian Altar
    Phyrexian Altar     by sacrificing
    Ugin's Nexus
    Ugin's Nexus    , adding one mana of any color
  5. Ugin's Nexus
    Ugin's Nexus     is exiled instead of being put into your graveyard, causing you to take an extra turn after this one
  6. Athreos, Shroud-Veiled
    Athreos    ' third ability triggers, causing you to return
    Ugin's Nexus
    Ugin's Nexus     from exile to the battlefield
  7. Resolve the
    Nahiri's Resolve
    Nahiri's Resolve     trigger from step 2, exiling
    Ugin's Nexus
    Ugin's Nexus     until your next upkeep
  8. Move to your extra turn
  9. At the beginning of your upkeep,
    Nahiri's Resolve
    Nahiri's Resolve     triggers, returning
    Ugin's Nexus
    Ugin's Nexus     from exile to the battlefield
  10. Repeat

Results

  1. Infinite turns
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