Mikaeus, the Unhallowed + Phantom Train + The Reaper, King No More

BRG identity

Commander legal

The 3 combo pieces

• Mikaeus, the Unhallowed
• Phantom Train
• The Reaper, King No More

How to execute it

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

What the combo produces

• Infinite -1/-1 counters
• Infinite +1/+1 counters on a creature
• Infinite creature LTB
• Infinite death triggers
• Infinite ETB
• Infinite recursion of non-Human creatures you control
• Infinite sacrifice triggers