Color Identity: W, U, B, R

Prerequisites

  1.  
    Port Razer
    Port Razer
    in your graveyard.
  2.  
    Yore-Tiller Nephilim
    Yore-Tiller Nephilim
    and
    Altar of Dementia
    Altar of Dementia
    on the battlefield.
  3. Yore-Tiller Nephilim
    Yore-Tiller Nephilim
    does not have summoning sickness.
  4. An opponent is unable to block creatures you control.

Steps

  1. Declare
    Yore-Tiller Nephilim
    Yore-Tiller Nephilim
    as an attacker.
  2. Yore-Tiller Nephilim
    Yore-Tiller Nephilim
    triggers, returning
    Port Razer
    Port Razer
    from your graveyard onto the battlefield tapped and attacking.
  3. Deal combat damage with
    Port Razer
    Port Razer
    and
    Yore-Tiller Nephilim
    Yore-Tiller Nephilim
    .
  4. Port Razer
    Port Razer
    triggers, untapping each creature you control and causing you to get an additional combat phase after this one.
  5. Activate
    Altar of Dementia
    Altar of Dementia
    by sacrificing
    Port Razer
    Port Razer
    , causing target player to mill cards equal to
    Port Razer
    Port Razer
    's power.
  6. Repeat each combat phase.

Results

  1. Infinite combat damage.
  2. Infinite combat phases.
  3. Infinite death triggers.
  4. Infinite ETB.
  5. Infinite LTB.
  6. Infinite mill.
  7. Infinite sacrifice triggers.
  8. Infinite self-mill.
  9. Infinite untap of creatures you control.

Metadata

  1. In 2 decks according to EDHREC.
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