Mikaeus, the Unhallowed, and Evereth, Viceroy of Plunder

Prerequisites

• Mikaeus, the Unhallowed on the battlefield
• Evereth, Viceroy of Plunder on the battlefield

Steps

1. Activate Evereth by sacrificing the creature with persist
2. When that creature dies, its persist ability triggers, returning it from your graveyard to the battlefield with a -1/-1 counter on it
3. Resolve the Evereth ability
4. Activate Evereth by sacrificing the persist creature
5. When the persist creature dies, its undying ability triggers, returning it from your graveyard to the battlefield with a +1/+1 counter on it
6. Resolve the Evereth ability
7. Repeat

Results

• Infinite +1/+1 counters on a creature
• Infinite creature ETB
• Infinite creature LTB
• Infinite creature sacrifice triggers
• Infinite damage
• Infinite death triggers