Mortuary + Bolas's Citadel + Overgrowth Elemental + Fanatical Firebrand

Mortuary

Bolas's Citadel

Overgrowth Elemental

Fanatical Firebrand

How it works

1. Activate Fanatical Firebrand by tapping and sacrificing it.
2. When Fanatical Firebrand dies, Mortuary and Overgrowth Elemental trigger.
3. Resolve the Mortuary trigger, putting Fanatical Firebrand from your graveyard onto the top of your library.
4. Resolve the Overgrowth Elemental trigger, causing you to gain 1 life
5. Resolve the Fanatical Firebrand ability.
6. Cast Fanatical Firebrand from the top of your library by paying 1 life.
7. Repeat.

This clever loop turns a modest Goblin pirate into a relentless engine by leveraging Bolas's Citadel to cast spells directly from the top of your library using life instead of mana. When you activate Fanatical Firebrand, sacrificing it to deal damage, Mortuary immediately intercepts it on the way to the graveyard to place it right back on top of your library. Meanwhile, Overgrowth Elemental cushions the life cost paid to Bolas's Citadel by granting you 1 life every time a creature dies, sustaining your momentum indefinitely as you replay Fanatical Firebrand over and over again.