Deathrender + Sin, Unending Cataclysm Combos

3 known combos featuring both cards in Commander

Infinite ETB Infinite LTB Infinite death triggers Infinite sacrifice triggers Infinite colorless mana

Combo 1 with Heirloom Blade + Ashnod's Altar

Also requires: Heirloom Blade Heirloom Blade Ashnod's Altar Ashnod's Altar
Results: Infinite ETB · Infinite LTB · Infinite colorless mana · Infinite death triggers · Infinite sacrifice triggers
Steps
  1. Activate Ashnod's Altar by sacrificing Sin, adding {C}{C}.
  2. When Sin dies, it, Heirloom Blade and Deathrender trigger.
  3. Resolve the Sin trigger, shuffling it into your library.
  4. Resolve the Heirloom Blade trigger, causing you to reveal cards from the top of your library until you reveal a creature that shares a card type with Sin and put it into your hand
  5. Resolve the Deathrender trigger, putting the creature from your hand onto the battlefield and attaching Deathrender to it.
  6. Activate Heirloom Blade's equip ability by paying {1}, attaching it to the creature.
  7. Repeat.

Combo 2 with Heirloom Blade + Phyrexian Altar

Also requires: Heirloom Blade Heirloom Blade Phyrexian Altar Phyrexian Altar
Results: Infinite ETB · Infinite LTB · Infinite death triggers · Infinite sacrifice triggers
Show steps
  1. Activate Phyrexian Altar by sacrificing Sin, adding {1}.
  2. When Sin dies, it, Heirloom Blade and Deathrender trigger.
  3. Resolve the Sin trigger, shuffling it into your library.
  4. Resolve the Heirloom Blade trigger, causing you to reveal cards from the top of your library until you reveal a creature that shares a card type with Sin and put it into your hand
  5. Resolve the Deathrender trigger, putting the creature from your hand onto the battlefield and attaching Deathrender to it.
  6. Activate Heirloom Blade's equip ability by paying {1}, attaching it to the creature.
  7. Repeat.

Combo 3 with Heirloom Blade + Thermopod

Also requires: Heirloom Blade Heirloom Blade Thermopod Thermopod
Results: Infinite ETB · Infinite LTB · Infinite death triggers · Infinite sacrifice triggers
Show steps
  1. Activate Thermopod by sacrificing Sin, adding {R}.
  2. When Sin dies, it, Heirloom Blade and Deathrender trigger.
  3. Resolve the Sin trigger, shuffling it into your library.
  4. Resolve the Heirloom Blade trigger, causing you to reveal cards from the top of your library until you reveal a creature that shares a card type with Sin and put it into your hand
  5. Resolve the Deathrender trigger, putting the creature from your hand onto the battlefield and attaching Deathrender to it.
  6. Activate Heirloom Blade's equip ability by paying {1}, attaching it to the creature.
  7. Repeat.
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