Cast Ebondeath from your graveyard by paying {B}{B} due to Green Goblin.
When Ebondeath enters, Necroduality triggers. Holding priority, activate Phyrexian Altar by sacrificing Ebondeath, adding {B}.
Resolve the Necroduality trigger, creating a creature token.
Activate Phyrexian Altar by sacrificing the creature token, adding {B}.
Repeat.

Infinite creature LTB

Infinite creature ETB

Infinite creature sacrifice triggers

Infinite death triggers

Infinite storm count

Norman Osborn // Green Goblin

Ebondeath, Dracolich

Phyrexian Altar

Necroduality

Cast Ebondeath from your graveyard by paying {B}{B} due to Green Goblin.
When Ebondeath enters, Molten Echoes triggers. Holding priority, activate Phyrexian Altar by sacrificing Ebondeath, adding {B}.
Resolve the Molten Echoes trigger, creating a creature token.
Activate Phyrexian Altar by sacrificing the creature token, adding {B}.
Repeat.

Molten Echoes

Cast Ebondeath from your graveyard by paying {B}{B} due to Green Goblin.
Oketra's Monument triggers, creating a creature token.
Activate Phyrexian Altar by sacrificing the creature token and Ebondeath, adding {B}{B}.
Repeat.

Oketra's Monument

Cast Ebondeath from your graveyard by paying {B}{B} due to Green Goblin.
Genesis Chamber triggers, creating a creature token.
Activate Phyrexian Altar by sacrificing the creature token and Ebondeath, adding {B}{B}.
Repeat.

Genesis Chamber

Cast Ebondeath from your graveyard by paying {B}{B} due to Green Goblin.
Primeval Bounty triggers, creating a creature token.
Activate Phyrexian Altar by sacrificing the creature token and Ebondeath, adding {B}{B}.
Repeat.

Primeval Bounty

Cast Ebondeath from your graveyard by paying {B}{B} due to Green Goblin.
God-Eternal Oketra triggers, creating a creature token.
Activate Phyrexian Altar by sacrificing the creature token and Ebondeath, adding {B}{B}.
Repeat.

God-Eternal Oketra

Cast Ebondeath from your graveyard by paying {B}{B} due to Green Goblin.
Blessed Sanctuary triggers, creating a creature token.
Activate Phyrexian Altar by sacrificing the creature token and Ebondeath, adding {B}{B}.
Repeat.

Blessed Sanctuary

Cast Ebondeath from your graveyard by paying {B}{B} due to Green Goblin.
Angelic Sell-Sword triggers, creating a creature token.
Activate Phyrexian Altar by sacrificing the creature token and Ebondeath, adding {B}{B}.
Repeat.

Angelic Sell-Sword

Cast Ebondeath from your graveyard by paying {B}{B} due to Green Goblin.
Torens triggers, creating a creature token.
Activate Phyrexian Altar by sacrificing the creature token and Ebondeath, adding {B}{B}.
Repeat.

Torens, Fist of the Angels

Cast Ebondeath from your graveyard by paying {B}{B} due to Green Goblin.
Selvala triggers, creating a creature token.
Activate Phyrexian Altar by sacrificing the creature token and Ebondeath, adding {B}{B}.
Repeat.

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