Mortuary + Goblin Bombardment + Memnite + Gwenom, Remorseless

Mortuary

Goblin Bombardment

Memnite

Gwenom, Remorseless

How it works

1. Activate Goblin Bombardment by sacrificing Memnite
2. When Memnite dies, Mortuary triggers, putting Memnite from your graveyard onto the top of your library.
3. Resolve the Goblin Bombardment ability.
4. Cast Memnite from the top of your library by paying 0 life.
5. Repeat.

This clever loop is propelled by Gwenom, Remorseless, whose attack trigger lets you cast spells from the top of your library by paying life equal to their mana value rather than their mana cost. Because Memnite costs zero mana, you can cast it off the top of your library for zero life, immediately feeding it to Goblin Bombardment to deal a point of damage. As Memnite hits the graveyard, Mortuary steps in to instantly recycle the creature right back to the top of your library, setting up the exact same free cast all over again. By repeating this cycle, you leverage Goblin Bombardment's sacrifice outlet to turn a single zero-mana artifact creature into an infinite storm of damage, deaths, and sacrifice triggers.