Cast Devoted Grafkeeper from your graveyard for its disturb cost by paying {W}{U}, causing it to enter the battlefield as Departed Soulkeeper.
Oketra's Monument triggers, creating a 1/1 Warrior creature token.
Activate Phyrexian Altar twice by sacrificing the Warrior and Departed Soulkeeper, adding {W}{U}.
Departed Soulkeeper is not exiled due to Humility removing its ability.
Repeat.

Infinite death triggers

Infinite ETB

Infinite LTB

Infinite sacrifice triggers

Infinite storm count

Phyrexian Altar

Devoted Grafkeeper // Departed Soulkeeper

Oketra's Monument

Humility

Cast Devoted Grafkeeper from your graveyard for its disturb cost by paying {W}{U}, causing it to enter the battlefield as Departed Soulkeeper.
Oketra's Monument triggers, creating a 1/1 Warrior creature token.
Activate Phyrexian Altar twice by sacrificing the Warrior and Departed Soulkeeper, adding {W}{U}.
Departed Soulkeeper is not exiled due to Overwhelming Splendor removing its ability.
Repeat.

Overwhelming Splendor

Cast Devoted Grafkeeper from your graveyard for its disturb cost by paying {W}{U}, causing it to enter the battlefield as Departed Soulkeeper.
Oketra's Monument triggers, creating a 1/1 Warrior creature token.
Activate Phyrexian Altar twice by sacrificing the Warrior and Departed Soulkeeper, adding {W}{U}.
Departed Soulkeeper is not exiled due to Dress Down removing its ability.
Repeat.

Dress Down

Cast Departed Soulkeeper from your graveyard by paying it's disturb cost of {1}{W}{U}.
Departed Soulkeeper enters the battlefield as a copy of Composite Golem.
Activate Departed Soulkeeper by sacrificing it, adding {W}{U}{B}{R}{G}.
Repeat.

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