Mikaeus, the Unhallowed + Otherworldly Escort + Bloodflow Connoisseur

Mikaeus, the Unhallowed

Otherworldly Escort

Bloodflow Connoisseur

How it works

1. Activate Bloodflow Connoisseur by sacrificing Otherworldly Escort.
2. When Otherworldly Escort dies, it triggers, returning itself from your graveyard to the battlefield as a Spirit Detective.
3. Resolve the Bloodflow Connoisseur ability.
4. Activate Bloodflow Connoisseur by sacrificing Otherworldly Escort.
5. When Otherworldly Escort dies, its undying ability triggers, returning it from your graveyard to the battlefield with a +1/+1 counter on it.
6. Resolve the Bloodflow Connoisseur ability.
7. Repeat.

This loop is a masterclass in exploiting replacement effects and counter interactions to generate infinite death and sacrifice triggers. By using Bloodflow Connoisseur as a dedicated sacrifice outlet, you feed it fuel while constantly recycling Otherworldly Escort through its own death trigger and Mikaeus, the Unhallowed's undying grant. Because Otherworldly Escort changes its characteristics the first time it dies and returns as a Spirit Detective, its subsequent resurrections smoothly alternate between its own self-reviving clause and Mikaeus, the Unhallowed's passive undying ability to keep the cycle spinning endlessly.