Mortuary + Phyrexian Dreadnought + Embalmed Ascendant + Gwenom, Remorseless

Mortuary

Phyrexian Dreadnought

Embalmed Ascendant

Gwenom, Remorseless

How it works

1. Cast Phyrexian Dreadnought from the top of your library by paying 1 life.
2. When Phyrexian Dreadnought enters, it triggers, causing you to sacrifice it.
3. When Phyrexian Dreadnought dies, Mortuary and Embalmed Ascendant trigger.
4. Resolve the Mortuary trigger, putting Phyrexian Dreadnought from your graveyard onto the top of your library.
5. Resolve the Embalmed Ascendant trigger, causing you to gain 1 life and each opponent to lose 1 life.
6. Repeat.