Phyrexian Altar + The Sibsig Ceremony Combos

4 known combos featuring both cards in Commander

Infinite self-mill Near-infinite ETB Near-infinite storm count Near-infinite LTB Near-infinite death triggers

Combo 1 with Pitiless Plunderer + Ebondeath, Dracolich

Results: Infinite LTB · Infinite ETB · Infinite colored mana · Infinite sacrifice triggers · Infinite death triggers · Infinite storm count · Infinite creature tokens · Infinite Treasure tokens
Steps
  1. Cast Ebondeath from your graveyard by paying {B}{B}.
  2. When Ebondeath enters, The Sibsig Ceremony triggers, destroying Ebondeath and creating a 2/2 Zombie Druid creature token.
  3. When Ebondeath dies, Pitiless Plunderer triggers, creating a Treasure token.
  4. Activate Phyrexian Altar by sacrificing the Zombie Druid, adding {B}.
  5. When the Zombie Druid dies, Pitiless Plunderer triggers, creating a Treasure token.
  6. Activate a Treasure by tapping and sacrificing it, adding {B}.
  7. Repeat.

Combo 2 with Stinkweed Imp + Guardian Project

Results: Infinite self-mill · Near-infinite ETB · Near-infinite storm count · Near-infinite LTB · Near-infinite death triggers · Near-infinite sacrifice triggers · Near-infinite colored mana · Near-infinite creature tokens
Show steps
  1. Cast Stinkweed Imp by paying {B} due to The Sibsig Ceremony.
  2. When Stinkweed Imp enters, The Sibsig Ceremony and Guardian Project trigger.
  3. Holding priority, activate Phyrexian Altar by sacrificing Stinkweed Imp, adding {B}.
  4. Resolve the Sibsig Ceremony trigger, failing to destroy Stinkweed Imp as it's no longer on the battlefield and creating a 2/2 Zombie Druid creature token.
  5. Resolve the Guardian Project trigger, causing you to mill five cards and return Stinkweed Imp from your graveyard to your hand due to Stinkweed Imp's dredge ability.
  6. Repeat.

Combo 3 with Stinkweed Imp + Kindred Discovery

Results: Infinite self-mill · Near-infinite ETB · Near-infinite storm count · Near-infinite LTB · Near-infinite death triggers · Near-infinite sacrifice triggers · Near-infinite colored mana · Near-infinite creature tokens
Show steps
  1. Cast Stinkweed Imp by paying {B} due to The Sibsig Ceremony.
  2. When Stinkweed Imp enters, The Sibsig Ceremony and Kindred Discovery trigger.
  3. Holding priority, activate Phyrexian Altar by sacrificing Stinkweed Imp, adding {B}.
  4. Resolve the Sibsig Ceremony trigger, failing to destroy Stinkweed Imp as it's no longer on the battlefield and creating a 2/2 Zombie Druid creature token.
  5. Resolve the Kindred Discovery trigger, causing you to mill five cards and return Stinkweed Imp from your graveyard to your hand due to Stinkweed Imp's dredge ability.
  6. Repeat.

Combo 4 with Stinkweed Imp + The Great Henge

Results: Infinite self-mill · Near-infinite ETB · Near-infinite storm count · Near-infinite LTB · Near-infinite death triggers · Near-infinite sacrifice triggers · Near-infinite colored mana · Near-infinite creature tokens
Show steps
  1. Cast Stinkweed Imp by paying {B} due to The Sibsig Ceremony.
  2. When Stinkweed Imp enters, The Sibsig Ceremony and The Great Henge trigger.
  3. Holding priority, activate Phyrexian Altar by sacrificing Stinkweed Imp, adding {B}.
  4. Resolve the Sibsig Ceremony trigger, failing to destroy Stinkweed Imp as it's no longer on the battlefield and creating a 2/2 Zombie Druid creature token.
  5. Resolve the The Great Henge trigger, causing you to mill five cards and return Stinkweed Imp from your graveyard to your hand due to Stinkweed Imp's dredge ability.
  6. Repeat.
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