Mikaeus, the Unhallowed + Soulstinger + Shilgengar, Sire of Famine

Mikaeus, the Unhallowed

Soulstinger

Shilgengar, Sire of Famine

How it works

1. Activate Shilgengar by sacrificing Soulstinger.
2. When Soulstinger dies, its undying ability triggers, returning it from your graveyard to the battlefield with a +1/+1 counter on it.
3. When Soulstinger enters the battlefield, it triggers, putting a -1/-1 counter on it.
4. Resolve the Shilgengar ability
5. Repeat.

This looping mechanism turns the recursive nature of death into a self-sustaining engine, anchored by Mikaeus, the Unhallowed granting its passive undying buff to your non-Humans. When Shilgengar, Sire of Famine demands a sacrifice, you feed it Soulstinger, which immediately triggers its own undying ability due to Mikaeus, the Unhallowed to return to the battlefield with a +1/+1 counter. To clear that counter and keep the cycle going, Soulstinger's own entry trigger targets itself with two -1/-1 counters, which immediately annihilate both the +1/+1 counter and one of the -1/-1 counters through state-based actions. This leaves Soulstinger completely clean of counters and ready to be sacrificed to Shilgengar, Sire of Famine all over again, generating infinite Blood tokens and death triggers in the process.