Blightbeetle + Phyrexian Altar + Fateful Handoff

Blightbeetle

Phyrexian Altar

Fateful Handoff

How it works

1. Donate Blightbeetle to an opponent
2. Activate Phyrexian Altar by sacrificing the undying creature.
3. When the undying creature dies, its undying ability triggers, returning itself from your graveyard to the battlefield without a +1/+1 counter on it due to Blightbeetle.
4. Repeat from step 2.

This clever loop revolves around donating **Blightbeetle** to your opponent so that its static ability—which forbids your opponents' creatures from receiving +1/+1 counters—permanently neutralizes the drawback of an undying creature under their control. With **Blightbeetle** locked on their side of the board, you can repeatedly sacrifice that undying creature to **Phyrexian Altar** for infinite colored mana, as its return to the battlefield will never trigger the preventive counter that normally stops an undying loop. While the provided steps trace this engine, you can also utilize **Fateful Handoff** beforehand to hand over the **Blightbeetle** while drawing cards equal to its mana value, smoothly setting up the opponent to host your infinite sacrifice machine.