Mortuary + Blasting Station + Tarpan + Gwenom, Remorseless

Mortuary

Blasting Station

Tarpan

Gwenom, Remorseless

How it works

1. Activate Blasting Station by tapping it and sacrificing Tarpan.
2. When Tarpan dies, it and Mortuary triggers.
3. Resolve the Mortuary trigger, putting Tarpan from your graveyard onto the top of your library.
4. Resolve the Tarpan trigger, causing you to gain 1 life
5. Resolve the Blasting Station ability.
6. Cast Tarpan from the top of your library by paying 1 life due to Gwenom.
7. When Tarpan enters, Blasting Station triggers, untapping Blasting Station.
8. Repeat.

This loop creates a devastating feedback loop by turning Blasting Station into a repeatable engine that continuously recycles your sacrifice fodder. Whenever you sacrifice Tarpan to deal damage, Mortuary steps in to instantly rescue it from the graveyard by placing it right back on top of your library. From there, Gwenom, Remorseless allows you to cast Tarpan straight from the top of your library for life instead of mana, while Tarpan's own life-on-death trigger neatly cushions the life cost. Finally, every time that creature enters the battlefield, Blasting Station untaps itself to ready the artifact for the next iteration, letting you deal infinite damage and build an infinite storm count.