Phantom Train + River Kelpie + Thran Vigil

UB identity

Commander legal

The 3 combo pieces

• Phantom Train
• River Kelpie
• Thran Vigil

How to execute it

1. Activate Phantom Train by sacrificing River Kelpie.
2. When River Kelpie dies, its persist ability triggers, returning it from your graveyard to the battlefield with a -1/-1 counter on it.
3. Thran Vigil and River Kelpie trigger.
4. Resolve the Thran Vigil trigger, putting a +1/+1 counter on River Kelpie.
5. Resolve the River Kelpie trigger, causing you to draw a card.
6. Resolve the Phantom Train ability
7. Repeat.

What the combo produces

• Infinite card draw
• Infinite draw triggers
• Near-infinite +1/+1 counters on a creature
• Near-infinite creature sacrifice triggers
• Near-infinite death triggers
• Near-infinite ETB
• Near-infinite LTB