Tayam, Luminous Enigma, Cathodion, Skittering Precursor, and Phantom Train

Prerequisites

• Tayam, Luminous Enigma on the battlefield
• Cathodion on the battlefield
• Skittering Precursor on the battlefield
• Phantom Train on the battlefield
• available

Steps

1. Activate Tayam by paying and removing three counters from creatures you control
2. Holding priority, activate Phantom Train by sacrificing Cathodion
3. When Cathodion dies, it and Skittering Precursor trigger Resolve the Cathodion trigger, adding
4. Resolve the Skittering Precursor trigger, creating a 0/1 Eldrazi Spawn creature token that enters the battlefield with a vigilance counter due to Tayam
5. Resolve the Phantom Train, putting a +1/+1 counter on Phantom Train and causing it to become a creature until end of turn Resolve the Tayam ability from step 1, causing you to mill three cards and return Cathodion from your graveyard to the battlefield with a vigilance counter on it
6. Repeat

Results

• Infinite +1/+1 counters on a creature
• Infinite creature ETB
• Infinite creature LTB
• Infinite creature sacrifice triggers
• Infinite creature tokens
• Infinite death triggers
• Infinite self-mill