Zul Ashur, Lich Lord + Intruder Alarm + Bloodflow Connoisseur

Zul Ashur, Lich Lord

Intruder Alarm

Bloodflow Connoisseur

How it works

1. Activate Zul Ashur by tapping it, targeting a Zombie card in your graveyard.
2. Activate any number of creatures you control by tapping them, adding enough mana to cast the Zombie.
3. Cast the Zombie from your graveyard by paying its mana cost.
4. When the Zombie enters the battlefield, Intruder Alarm triggers, untapping all creatures.
5. Activate Bloodflow Connoisseur by sacrificing the Zombie, putting a +1/+1 counter on Bloodflow Connoisseur.
6. Repeat.

This brilliant loop transforms the battlefield into a tireless engine of rebirth, anchored by Zul Ashur, Lich Lord granting the ability to repeatedly summon a Zombie from your graveyard. Each time that Zombie enters the battlefield, Intruder Alarm triggers to untap all of your creatures—including any mana-producers needed to pay for the cast and Zul Ashur, Lich Lord itself if it untapped, while also untapping Bloodflow Connoisseur. You can then feed the newly arrived Zombie to Bloodflow Connoisseur's sacrifice ability to grow a growing +1/+1 counter threat while resetting the board for the next iteration.