Eirdu, Carrier of Dawn // Isilu, Carrier of Twilight + Nearheath Stalker + Phantom Train

RWB identity

Commander legal

The 3 combo pieces

• Eirdu, Carrier of Dawn // Isilu, Carrier of Twilight
• Nearheath Stalker
• Phantom Train

How to execute it

1. Activate Phantom Train by sacrificing Nearheath Stalker
2. When Nearheath Stalker 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 Nearheath Stalker
5. When Nearheath Stalker dies, its persist ability triggers, returning it from your graveyard to the battlefield with a -1/-1 counter on it.
6. Nearheath Stalker 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