Mikaeus, the Unhallowed + Grim Poppet + Bloodflow Connoisseur

Mikaeus, the Unhallowed

Grim Poppet

Bloodflow Connoisseur

How it works

1. Activate Bloodflow Connoisseur by sacrificing Grim Poppet.
2. When Grim Poppet dies, its undying ability triggers, returning it from your graveyard to the battlefield without a +1/+1 counter on it due to its replacement effect.
3. Resolve the Bloodflow Connoisseur ability
4. Repeat.

This loop is a masterclass in turning internal counter conflict into a lethal engine, using Mikaeus, the Unhallowed to grant undying to our non-Human battery. When you feed Grim Poppet to Bloodflow Connoisseur, Mikaeus brings the Poppet right back to the battlefield fresh and free of counters. But the real genius lies in Grim Poppet's own active ability: by stripping away its -1/+1 counters—or in this case, resetting its state entirely upon revival—you can continually fuel Bloodflow Connoisseur's appetite to stack infinite +1/+1 counters while generating limitless sacrifice and death triggers.