Shepherd of the Cosmos + Kaya's Ghostform + Blasting Station

Shepherd of the Cosmos

Kaya's Ghostform

Blasting Station

How it works

1. Activate Blasting Station by tapping it and sacrificing Shepherd of the Cosmos.
2. When Shepherd of the Cosmos dies, Kaya's Ghostform triggers, returning Shepherd of the Cosmos from your graveyard to the battlefield.
3. When Shepherd of the Cosmos enters the battlefield, it and Blasting Station trigger.
4. Resolve the Shepherd of the Cosmos trigger, returning Kaya's Ghostform from your graveyard to the battlefield attached to Shepherd of the Cosmos.
5. Resolve the Blasting Station trigger, untapping it.
6. Resolve the Blasting Station ability from step 1, dealing 1 damage to any target.
7. Repeat.

This elegant loop turns a modest Angel into an endless artillery strike by tightly weaving together recursion and untap triggers. You start by sacrificing Shepherd of the Cosmos to Blasting Station, which promptly deals a point of damage while its own passive ability waits in the wings to untap it whenever a creature arrives. Meanwhile, Kaya's Ghostform ensures that the fallen Shepherd immediately bounces right back to the battlefield rather than staying in the graveyard. That fresh entry triggers Shepherd of the Cosmos's own enter-the-battlefield ability to fish Kaya's Ghostform back out of the graveyard and reattach it, readying the whole apparatus to fire again.