Leonardo, Sewer Samurai + Solemnity + Rograkh, Son of Rohgahh + Phantom Train

Leonardo, Sewer Samurai

Solemnity

Rograkh, Son of Rohgahh

Phantom Train

How it works

1. Activate Phantom Train by sacrificing Rograkh.
2. Cast Rograkh from your graveyard by paying 0. It will not enter with a finality counter on it due to Solemnity.
3. Repeat.

This clever loop relies on Leonardo, Sewer Samurai to cast Rograkh, Son of Rohgahh straight from your graveyard for zero mana, fueling an endless stream of artifact or creature sacrifices for Phantom Train. Normally, Leonardo would saddle Rograkh with a finality counter to exile it upon death, but Solemnity acts as an absolute shield that prevents any counters from ever being placed on your permanents. Without that restriction, you can sacrifice Rograkh over and over again to pump Phantom Train's power to astronomical heights while generating infinite entry, exit, and death triggers.