Wall of Roots, Agatha's Soul Cauldron, Tayam, Luminous Enigma, Phyrexian Altar, and Aven Eternal

Prerequisites

• Wall of Roots in exile
• Agatha's Soul Cauldron on the battlefield
• Tayam, Luminous Enigma on the battlefield
• Phyrexian Altar on the battlefield
• Aven Eternal in hand
• available

Steps

1. Cast Aven Eternal by paying its mana cost; it enters with a vigilance counter due to Tayam
2. When Aven Eternal enters, it triggers, creating a 0/0 creature token with a +1/+1 counter on it as well as a vigilance counter due to Tayam
3. Declare that you are activating Tayam's ability, so state-based actions will not be checked until the ability is activated
4. While paying that ability's cost, activate the creature token using the Wall of Roots mana ability from Agatha's Soul Cauldron by putting a -0/-1 counter on it, adding
5. Complete the activation by paying and removing a vigilance counter from each of the two creatures and a -0/-1 counter from the Army token
6. Holding priority, activate Phyrexian Altar twice by sacrificing Aven Eternal and the creature token, adding two mana
7. Resolve Tayam's ability, milling three and returning Aven Eternal from your graveyard to the battlefield with a vigilance counter on it
8. Repeat from step 2

Results

• Infinite creature ETB
• Infinite creature LTB
• Infinite creature sacrifice triggers
• Infinite death triggers
• Infinite self-mill