Infinite LTB, Infinite ETB, Infinite death triggers, Infinite +1/+1 counters on a creature, Infinite sacrifice triggers
Activate Phantom Train by sacrificing Shepherd of the Cosmos.
When Shepherd of the Cosmos dies, Kaya's Ghostform triggers, returning Shepherd of the Cosmos from your graveyard to the battlefield.
When Shepherd of the Cosmos enters the battlefield, it triggers, returning Kaya's Ghostform from your graveyard to the battlefield attached to Shepherd of the Cosmos.
Resolve the Phantom Train ability, putting a +1/+1 counter on it.
Repeat.
Component Cards
How It Works
Activate Phantom Train by sacrificing Shepherd of the Cosmos.
When Shepherd of the Cosmos dies, Kaya's Ghostform triggers, returning Shepherd of the Cosmos from your graveyard to the battlefield.
When Shepherd of the Cosmos enters the battlefield, it triggers, returning Kaya's Ghostform from your graveyard to the battlefield attached to Shepherd of the Cosmos.
Resolve the Phantom Train ability, putting a +1/+1 counter on it.
Repeat.