Leonardo, Sewer Samurai + Solemnity + Blasting Station + Kobolds of Kher Keep

Leonardo, Sewer Samurai

Solemnity

Blasting Station

Kobolds of Kher Keep

How it works

1. Activate Blasting Station by tapping it and sacrificing Kobolds of Kher Keep.
2. Cast Kobolds of Kher Keep from your graveyard by paying 0. It will not enter with a finality counter on it due to Solemnity.
3. When Kobolds of Kher Keep enters, Blasting Station triggers, untapping Blasting Station.
4. Repeat.

This loop transforms free creature fodder into an engine of relentless damage by turning the graveyard into an extension of your hand. Because Solemnity acts as a permanent shield against counters, it bypasses Leonardo, Sewer Samurai's drawback of putting finality counters on creatures cast from the graveyard. This allows you to recast Kobolds of Kher Keep over and over for zero mana, feeding them directly into Blasting Station. Every single entry triggers the Station to untap itself, while sacrificing the Kobolds fuels the loop to machine-gun down any target with infinite damage.