Eirdu, Carrier of Dawn // Isilu, Carrier of Twilight + Phantom Train + Strangleroot Geist

WBG identity

Commander legal

The 3 combo pieces

• Eirdu, Carrier of Dawn // Isilu, Carrier of Twilight
• Phantom Train
• Strangleroot Geist

How to execute it

1. Activate Phantom Train by sacrificing Strangleroot Geist
2. When Strangleroot Geist dies, its undying ability triggers, returning it from your graveyard to the battlefield with a +1/+1 counter on it.
3. Resolve the Phantom Train ability.
4. Activate Phantom Train by sacrificing Strangleroot Geist
5. When Strangleroot Geist dies, its persist ability triggers, returning it from your graveyard to the battlefield with a -1/-1 counter on it.
6. Strangleroot Geist enters and dies as a state-based action due to having 0 toughness. Its undying ability triggers, returning it from your graveyard to the battlefield with a +1/+1 counter on it.
7. Resolve the Phantom Train ability from step 4.
8. Repeat from step 4.

What the combo produces

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