Relentless Dead + Carnival of Souls + Rooftop Storm + Zulaport Cutthroat + Woe Strider

Relentless Dead

Carnival of Souls

Rooftop Storm

Zulaport Cutthroat

Woe Strider

How it works

1. Cast Relentless Dead by paying 0.
2. When Relentless Dead enters the battlefield, Carnival of Souls triggers, causing you to add and lose 1 life.
3. Activate Woe Strider by sacrificing Relentless Dead.
4. When Relentless Dead dies, its first and second abilities trigger, as well as Zulaport Cutthroat.
5. Resolve the first Relentless Dead trigger, causing you to pay to return Relentless Dead from your graveyard to your hand.
6. Resolve the second Relentless Dead trigger, choosing not to pay.
7. Resolve the Zulaport Cutthroat trigger, causing each opponent to lose 1 life and you to gain 1 life.
8. Resolve the Woe Strider ability, causing you to scry 1.
9. Repeat.

This elegant loop transforms the undead into an engine of endless attrition, anchored entirely by Rooftop Storm making your Zombie spells completely free to cast. Whenever you drop Relentless Dead onto the battlefield for no mana, Carnival of Souls immediately demands a life while refunding the exact black mana needed to fuel the zombie's own return-to-hand trigger upon death. You feed the creature to Woe Strider's sacrifice outlet, triggering Zulaport Cutthroat to drain your opponents and gain you life with every single iteration.