Mikaeus, the Unhallowed + Phantom Train + Pith Driller

B identity

Commander legal

The 3 combo pieces

• Mikaeus, the Unhallowed
• Phantom Train
• Pith Driller

How to execute it

1. Activate Phantom Train by sacrifiicing Pith Driller.
2. When Pith Driller dies, its undying ability triggers, returning it from your graveyard to the battlefield with a +1/+1 counter on it.
3. When Pith Driller 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 on a creature
• Infinite creature LTB
• Infinite death triggers
• Infinite ETB
• Infinite sacrifice triggers