Cast Stinkweed Imp by paying {B} due to The Sibsig Ceremony.
When Stinkweed Imp enters, The Sibsig Ceremony and The Great Henge trigger.
Holding priority, activate Phyrexian Altar by sacrificing Stinkweed Imp, adding {B}.
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.
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.
Repeat.

Infinite self-mill

Near-infinite creature ETB

Near-infinite storm count

Near-infinite creature LTB

Near-infinite death triggers

Near-infinite creature sacrifice triggers

Near-infinite colored mana

Near-infinite creature tokens

The Sibsig Ceremony

Phyrexian Altar

Stinkweed Imp

The Great Henge

Cast Stinkweed Imp by paying {B} due to The Sibsig Ceremony.
When Stinkweed Imp enters, The Sibsig Ceremony and Guardian Project trigger.
Holding priority, activate Phyrexian Altar by sacrificing Stinkweed Imp, adding {B}.
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.
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.
Repeat.

Guardian Project

Cast Stinkweed Imp by paying {B} due to The Sibsig Ceremony.
When Stinkweed Imp enters, The Sibsig Ceremony and Kindred Discovery trigger.
Holding priority, activate Phyrexian Altar by sacrificing Stinkweed Imp, adding {B}.
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.
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.
Repeat.

Kindred Discovery

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