Phyrexian Altar + Relic Vial Combos

3 known combos featuring both cards in Commander

Infinite LTB Infinite ETB Infinite sacrifice triggers Infinite death triggers Infinite lifeloss

Combo 1 with Junji, the Midnight Sky + Metamorphosis Fanatic

Results: Infinite LTB · Infinite ETB · Infinite colored mana · Infinite sacrifice triggers · Infinite death triggers · Infinite lifeloss
Steps
  1. Activate Phyrexian Altar by sacrificing Metamorphosis Fanatic.
  2. When Metamorphosis Fanatic dies, Relic Vial triggers, causing you to gain 1 life and each opponent to lose 1 life.
  3. Activate Phyrexian Altar by sacrificing Junji.
  4. When Junji dies, it and Relic Vial trigger.
  5. Resolve the Relic Vial trigger, causing you to gain 1 life and each opponent to lose 1 life.
  6. Resolve the Junji trigger, returning Metamorphosis Fanatic from your graveyard to the battlefield and causing you to lose 2 life.
  7. When Metamorphosis Fanatic enters, it triggers, returning Junji from your graveyard to the battlefield.
  8. Repeat.

Combo 2 with Junji, the Midnight Sky + Karmic Guide

Results: Infinite LTB · Infinite ETB · Infinite colored mana · Infinite sacrifice triggers · Infinite death triggers · Infinite lifeloss
Show steps
  1. Activate Phyrexian Altar by sacrificing Karmic Guide.
  2. When Karmic Guide dies, Relic Vial triggers, causing you to gain 1 life and each opponent to lose 1 life.
  3. Activate Phyrexian Altar by sacrificing Junji.
  4. When Junji dies, it and Relic Vial trigger.
  5. Resolve the Relic Vial trigger, causing you to gain 1 life and each opponent to lose 1 life.
  6. Resolve the Junji trigger, returning Karmic Guide from your graveyard to the battlefield and causing you to lose 2 life.
  7. When Karmic Guide enters, it triggers, returning Junji from your graveyard to the battlefield.
  8. Repeat.

Combo 3 with Chainer, Dementia Master + Wurmcoil Engine

Results: Infinite LTB · Infinite ETB · Infinite sacrifice triggers · Infinite death triggers · Infinite lifegain triggers · Infinite lifeloss
Show steps
  1. Activate Phyrexian Altar by sacrificing Wurmcoil Engine, adding {B}.
  2. When Wurmcoil Engine dies, it and Relic Vial trigger.
  3. Resolve the Wurmcoil Engine trigger, creating two 3/3 Wurm artifact creature tokens.
  4. Resolve the Relic Vial trigger, causing you to gain 1 life and each opponent to lose 1 life.
  5. Activate Phyrexian Altar twice by sacrificing the Wurm tokens, adding {B}{B}.
  6. When the Wurms die, Relic Vial trigger twice, causing you to gain 2 life and each opponent to lose 2 life.
  7. Activate Chainer by paying {B}{B}{B} and 3 life, putting Wurmcoil Engine from your graveyard onto the battlefield.
  8. Repeat.
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