Havengul Lich + Rooftop Storm + Shambling Ghast + Bloodflow Connoisseur

Havengul Lich

Rooftop Storm

Shambling Ghast

Bloodflow Connoisseur

How it works

1. Activate Havengul Lich by paying 1, allowing you to cast Shambling Ghast card from your graveyard this turn.
2. Cast Shambling Ghast from your graveyard by paying 0 due to Rooftop Storm.
3. Activate Bloodflow Connoisseur by sacrificing Shambling Ghast.
4. When Shambling Ghast dies, it triggers, creating a Treasure token.
5. Resolve the Bloodflow Connoisseur ability.
6. Activate the Treasure by tapping and sacrificing it, adding 1.
7. Repeat.

This ingenious loop turns a simple graveyard into an endless cycle of sacrifice and rebirth by letting Rooftop Storm bypass the mana cost of casting Shambling Ghast straight from the graveyard. That casting is made possible in the first place by Havengul Lich, whose activation grants you permission to deploy the zombie again and again while fueling the loop's mana cost using the Treasure token created when Shambling Ghast dies. Finally, Bloodflow Connoisseur provides the reliable sacrifice outlet needed to repeatedly send the ghast back to the yard, feeding itself with endless +1/+1 counters along the way.