Mortuary + Bolas's Citadel + Bloodflow Connoisseur + Willow Geist

Mortuary

Bolas's Citadel

Bloodflow Connoisseur

Willow Geist

How it works

1. Activate Bloodflow Connoisseur by sacrificing Willow Geist.
2. When Willow Geist dies, it and Mortuary triggers.
3. Resolve the Mortuary trigger, putting Willow Geist from your graveyard onto the top of your library.
4. Resolve the Willow Geist trigger, causing you to gain 1 life
5. Resolve the Bloodflow Connoisseur ability.
6. Cast Willow Geist from the top of your library by paying 1 life due to Bolas's Citadel.
7. Repeat.

This loop turns a simple recycling trick into an engine of continuous growth and endurance. By using Bloodflow Connoisseur to sacrifice Willow Geist, you trigger its death ability to gain life while Mortuary quietly intercepts it, placing it right back on top of your library. From there, Bolas's Citadel lets you bypass mana entirely, letting you replay Willow Geist off the top of your library simply by paying a single point of life—a cost easily offset by the life you gained. Every iteration triggers Willow Geist's ability to grow with a +1/+1 counter as it leaves the graveyard, creating an endlessly repeating cascade of sacrifices, triggers, and mounting power.